Will, who was to have an audience with the lord Ethelwald as a "Killing Wyvern," offers to gather private soldiers to eliminate the frequent damage caused by monsters. Ethel once shows an intimidating attitude to such an outlandish offer, but decides to identify Will and forgive it. Head to a bar where adventurers gather to find friends to fight with.

Will, who was appointed as a paladin, was responsible for the reconstruction of the village and the extermination of demons. One day, he goes to "Beast Woods" with Reistov and Menel, who have two names, "Tsuranuki", in order to search for a unit that does not return. He feels something is wrong with the scattered bodies and proceeds to the valley in the back ...

Will and his friends are addicted to the traps of the demons and have routed. After seeing the seriously injured Menel, Will realizes that he has unknowingly put his companion in a dangerous eye, and realizes the difference in ability between his surroundings and himself. It was Menel who showed anger that stood in front of Will who was going to defeat the demon beast alone.

Ru begins his training under Will and Menel. He tells Will that he's eager to learn from him what courage is and what it means to be a warrior, but Will himself is struggling with the meaning of courage as he recalls the Lord of Holly's prophecy.

Following reports of undead sightings in Beast Woods, Will and Ru find an old burial site where they encounter a Herald of Stagnate, god of the undead. It turns out the Herald was using the undead to lure Will there and convey a message to him...

Will and his companions set out for the Rust Mountains to fight the dragon Valacirca. On the way, they pass by the City of the Dead, so Will decides to stop and visit his old home.

Just when it seems Will's fate is sealed, Stagnate appears and resurrects the former residents of the Iron Country. Gracefeel transfers their souls into Will, giving him the courage to face Valacirca again. Will's epic battle reaches its climax...