In New Orleans, Alex encounters an old college friend who is now a vampire. But when she is bitten she begins to transform into a vampire but the process will only be completed when she has taken her first human life.

Having been bitten by a vampire, Alex's transition to one will be complete as soon as she succeeds in killing the object of her blood lust -- Nick.

Kristin arrives in San Francisco from Boston to join the group's investigation of a series of church fires. What she doesn't tell them is that she thinks her younger brother may have joined the cult that the setting the fires.

Rachel falls in love with a man who turns out to have achieved his success by making a pact with the Devil. At the same time, Kat comes under attack by dark forces.

Nick witnessed his father's death, but then learns that his father did not die by accident. His father's ghost asks him to help find his murderer and avenge his death. But Nick has trouble solving the case when it comes to light that his father was abusive to him when he was a child.

The Legacy must intervene when a dead woman's spirit returns to earth from Heaven to rescue her lover's soul from Hell, not realizing the danger that he will return with new powers to commit evil.

Derek receives an ancient artifact shattered in pieces. Kristin and Alex take the task to re-assembling the package as Derek receives notice the sender, Samuel Kellig, was killed in an accident. The women discover Samuel's death may not have been an accident as they begin to put the urn back together as well as piece clues to Samuel's last dig. At the same time, Derek grows closer to Samuel's beautifully captivating fiance...a woman whose present character doesn't fit her profile.

Nick attends a boyhood friend's military funeral and gets re-acquainted with another. After catching up and returning home Nick is called up a few days later when Joe, the deceased, begins paying John troubling visits. Nick, along with Kristin's help, must find out why his friend is out for revenge against John then its up to Nick to stop Joe before his soul is doomed forever.

Members of the Barnard family have been dying, all under mysterious circumstances. When Rachel gets the Legacy involved to protect her old family friends, they soon realise that everything comes back to Todd's romance with Angela Sanchez, and her grandmother's pain.

After a freed cop killer is killed Derek and the team investigate when it becomes obvious it was a ritualistic murder. More importantly, the murder was done using an artifact stolen from a Legacy collection on display by a former member. Though, Det. Carmack is set against allowing the team to help he has no choice as the Legacy is set on solving the case and retrieving their stolen property. Soon the investigation leads Derek to a truth he had secretly hoped wasn't the truth...

Kat is on the job when the team is put in charge of cataloging and disbursing the bequeathed estate of Hanney Ellen Keane and Derek makes a grave error. Taking a few drinks from a cursed Irish Jug causes two ne'er-do-wellers escape from the Jug and possess Derek and Milo. Once the boys realize what year they're in and the fortune the one called Derek possesses they soon decide to stay awhile but before they can enjoy the riches they must get rid of the women. Being the only one that sees the two impostors for what they are Kat must think quickly and convince Alex to help her as Rachel is nowhere to be found.

A psychiatric patient of Rachel's attacks her during a session as time progresses Rachel becomes aggressive and exceedingly paranoid. The rest of the team try to help by investigating but she keeps pushing them away. Soon they have no choice but to step in and force Rachel to again come to terms with her demons before its too late.

Alex begins having dreams that cause her to sleepwalk. Grandma Rose worries for Alex's health and asks her to come home. Alex agrees and Nick accompanies her to see Rose. The dreams continue and grow more intense as the days go by. Rose begins to tell Alex of her ancestor, La Belle, and so the search for the truth behind Alex's dreams becomes clearer. A spirit from the past looks to come back through a familiar spirit...

A bolt of lighting strikes an autistic young man and returns him to normal. Nick and Derek investigate when the young man quickly grows into a genius and people around him start losing their health and intelligence...including Alex.

While Derek,Alex and Rachel investigate the death of a young nun,Nick tries to deal with his brothers death

Kristin in her continuing quest to find her father enlists Rachel's help. Together the two visit a Sanatorium that leads them to Sommerville. Unknown to them is the fact Sommerville was once a Japanase American concentration camp and that one of its former prisoners is about to imprison them. Rachel and Kristin must work together to form an escape plan while Nick and Derek quickly work from the outside to save the rest of their team.

With the boys out of town Alex, Rachel and Kristin are left to work on a special project. The women must uncover the secrets to a cube dating back to the Han Dynasty. Arriving to help them in this project is Nicholas Oldman but as he gets closer to each it becomes evident to at least one of them he has other plans for them and the cube.

Jeffrey Starr returns to San Francisco and his old tricks but when a psychic intervention goes awry the Legacy is called in to help. Reluctant to help Derek gives in when it becomes clear that Jeffery's life is in more danger than they first realized.

Once again on her quest for answers relating to her father's disappearance Kristin is on a mission. After receiving a map of the Holy Land written in archaic French and a cryptic message to meet in Istanbul Kristin is off on her own. The Legacy team must decipher the clues left on the map in order to find her and help her bring to a close a painful chapter in her life.

The Legacy is under siege and their assailants are unknown. Alex has gone for help, Nick has been taken down and away by their attackers leaving only Derek to decipher who's behind their attack. As he remembers past foes who may have come back for revenge Derek searches for Nick and guards his own back from threat. Further into his search the clues to who is trying to bring them down becomes obviously clear when Alex returns not quite herself and Derek comes face to face with the foe he should have known all along.

A mysterious White haired lady narrates this clip show meant to be a season ending cliff hanger. Foes from episodes past show up once again as examples of how the team's good work hasn't managed to overcome the evil that follows. Their work is hidden behind self righteous acts of hypocrisy the Lady claims as she urges one of the team members to join them...and at the end it seems she's succeeded...