A village is tormented by a Yoma, which is a demon that has disguised itself as a human it has eaten. As a last resort the Chief of the village has ask for the help from a Claymore, who are feared as they are half human, half Yoma. Raki is a young boy who has found an interest in the Claymore and he begins to follow her about until later when he discovers who the Yoma is.

It doesn't take much effort for Claire to quickly complete her job and so Claire and Raki are off while she waits for another job. A strange man from the organization comes to give Claire a new set of clothes but not only that, he also gives Claire a "Black Card". What does this Black Card mean to Claire? Raki later has an encounter with the same man from the organization, who explains to him exactly what Claymores are (half human, half Yoma).

Rabona the Holy City that does not allow the entry of unnatural beings is being preyed upon by a Yoma and as a last resort, have to disobey their own laws and called for help. So Claire now has a job to do but it will be different from the usual Yoma hunting, it's more of a covert operation and she has to suppress her powers to do so. During her searches Claire happens to run into 2 soldiers on patrol, but they only seem to get in the way of her job. After she manages to lose them, Claire faces the Yoma which happens to be an extremely strong one known as "Voracious Eater".

Another Claymore known as Teresa has appeared in a town where she quickly dispatches a Yoma, with no effort. She is well-known as for her nickname "Teresa of the Faint Smile" because she never releases her Yoma powers. In the town of Teo, as soon as she arrives there she ruthlessly attacks any Yoma she senses and after the massacre a girl with no name who was with one of the Yoma seems to be very attached to Teresa. This girl ends up following Teresa no matter what she did.

After naming the girl who was following her, Claire; Teresa is heading towards the town of Rokut to drop her off. At night while they are resting in the woods, the man whose arm was chopped off is back for revenge. It turns out that the girl was able to save her and not from the man but to save her lonely heart. Teresa later encounters the bandits but this time they have done something unforgivable which forces Teresa to do something unforgivable.

Two more Claymores have appeared, Sophia and Noel who have entered a town that has become a Yoma hive, don't require much effort to eradicate the hordes of Yoma. There are still some Yoma left but that is until Irene nicknamed, "Flash Sword Irene" finishes them off. Following Teresa's betrayal, the number 2-5 Claymores have gathered with orders to execute Teresa, but who is the remaining Claymore yet to arrive? The ultimate battle between Claymores is about to begin.

Continuing where the battle left off, Teresa of the Faint Smile will now have to face the Numbers 2-5 Claymores, who have released their full power. Knowing that she has never need to release her power, how will Teresa fair against these tough opponents? Overcome by her emotions, Priscilla surpasses the limit and becomes what is known by an "Awakened One".

Three Claymores arrive in the town of Toriro to only find Claire, who has already taken care of the Yomas. It is revealed that what Claire defeated in the Holy City was not a Voracious Eater but a regular Yoma; because Voracious Eater is a public term for what the organization labels an "Awakened One". Claire has been added to the expedition team to hunt an Awakened One, as a chance to measure the limits of her skills. How will Claire ranked no. 47, fair against such a powerful being after a shocking turn of events?

The team of Claymore reach the mountains and are surprised by what they encounter, a Male Awakened One. Another Claymore and a handler are watching the battle from a distance, but what do they appear to be plotting? The battle reaches its climatic stage, with all but the "Phantom Miria", badly wounded. This may be what the Awakened meant by "true despair", however Claire is one to know what true despair is really like and this is not it.

By working together, Miria and Claire were able to defeat the Male Awakened One, which surprised the handler observing the battle but the team are left with injuries all over the place. In the meantime while they recover from their injuries, they begin talking about their past and it seems like they all have something in common that led to them being teamed up together. It is revealed that they have all experienced the Awakening process in the past.

Following her recent experience in the mountains Claire is back to her jobs of taking care of Yoma, accompanied by Raki. In the light of her recent change in personality Claire has been given a job to hunt down another Awakened One, North to the village of Gonahl. As she reaches the rendezvous point, Claire is greeted by a lone Claymore and to her surprise it is non-other than the Claymore who lust for blood and battle, no.4 "Ophelia".

Claire has separated from Raki in order to save him from the merciless Ophelia, who is currently pursuing Claire. It doesn't take long for Ophelia to catch up with Claire, where she is forced to fight for her life. With Claire putting up a good fight, Ophelia gets excited and decides to reveal the secret behind the name she gave herself "Ophelia of the Ripples". Claire is now in a dire situation, yet there was no chance of winning to begin with, when suddenly a familiar face appears from the shadows.

Claire continues her intensive training with the former no .2 Irene and she doesn't seem to be improving much, without her dominant arm. Claire and Irene later part ways but not before Claire is given a farewell gift. It doesn't take long for Claire to run into some trouble again; however this time it's something monstrous yet someone she has already encountered. Will Claire prove that she is qualified to fight?

The Organization is getting uneasy of no. 47 Claire, after receiving no contact from her for three months. Following recent events, they end up taking drastic measures by sending out a Claymore on the mission to find Claire and it's made top priority. Meanwhile Claire is searching for Raki but while doing this a Claymore expedition team pass through the town, to hunt down an Awakened One; in the mountains nonetheless something seems odd about the situation.

Claire has joined the hunt for the Awakened One, in the mountains of Zakol, to save the no. 9 "Jeane". Things seem odd to begin with, as Claire enters the eerie lair, with an irregular Yoki flowing everywhere and the fight begins once she finds the source of the Yoki. Even with the Flash Sword it appears impossible for Claire to defeat her foe however the tables turn with the arrival of no. 3 "Galatea". More is revealed about the powerful Awakened One in the mountains and the reason why it's gathering more Awakened beings.

Following the events of the previous episode, Clarie has managed to make it to Jeane, in order to rescue her, nevertheless she is too late. Galatea continues her battle with the newly motivated Duff which is becoming more difficult for her than she originally thought. How will it turn out for the three warriors, in this dire situation?

After what occurred in the mountains of Zakol, Jeane is accompanying Claire until she can return her favour, however Claire already feels thankful to her because she is now able to fully control her "Flash Sword". Out of the blue Claire's handler Rubel turns up with the no. 5 "Rafaela" but not with request for her return to the organization but with orders to join the war, against Awakened beings, in the Northern Lands. This mission brings upon an unexpected reunion.

Awakened Beings have launched a surprise attack on the city of Pieta, forcing the teams of Claymores to begin their battles against these unbeatable creatures. Even with these incredibly powerful Awakened Beings to fight against there may be some Claymores who are able to handle this sort of situation, which will only get tougher in the future.

In the Northern country Raki is with two surprisingly helpful people however he is unaware that these two are the two most powerful Awakened Ones in the area; "Priscilla" and "Person of the Abyss, Isley". Meanwhile after having just survived the first attack, the teams of Claymores are recovering and replenishing their supplies along with some interesting developments.

Having just heard the news of what happened in the City of Pieta, Isley has ordered his entire army of 27 Awakened beings to annihilate the Claymores located there. With the probability of this mission ending in success zero, no matter the odds the teams of Claymores are still determined to carve out their path of survival. Meanwhile Raki is heading towards Pieta with Isley and Priscilla when he later discovers something shocking.

Rigardo also known as "The Silver-Eyed Lion King" has begun his rampage by targeting all the Captains. With four Captains down, in the end, just how many will survive this as the light of hope begins to fades away? Also Raki has learned what Priscilla is and he's able to empathize with her yet that still doesn't stop him from heading off, after news of nearby Claymores reaches his ears.

The fight rages on and while battling with the unbeatable Rigardo, Claire has inadvertently awakened partially and dealt a deadly blow. With her new found abilities Claire has proven herself to be a great adversary for the "The Silver-Eyed Lion King", so now he is finally able to go all-out.

The immense battle between the partially Awakened Claire and Rigardo is now over, though Claire has paid a terrible price for this and is on the verge of completely Awakening. Priscilla is able to sense this from afar and is so frightened that she runs away. Nonetheless she cannot run away from the past she thought she forgot, as her memories return and she is forced to remember about her family, about herself and of course "Teresa". An epic battle is about to commence.

In the middle of an active volcano, Claire and Priscilla are finally going to face-off and even in her partially Awakened form Claire is still not any closer to being a match for former no. 2 Priscilla. For whose sake is Claire willing to risk her life for? Just when Priscilla was about to finish things Miria, Helen and Deneve arrive just in the nick of time, although what can they do against this formidable foe, who hasn't even shown her latent power.

The battle between the two awesome powers Claire and Priscilla reaches its climax as Claire somehow manages to gather the strength and determination to go on. Raki and Jeane have also arrived to witness the bloodbath that is about to begin, yet what will be the overall outcome of this battle?