Aidan resurfaces from being grounded and finds the vampire community vastly changed. Ghost Sally fights to return from limbo and Josh and Nora face Ray while an ominous visitor comes to Boston looking for them.

Sally flirts with Trent, an old acquaintance. Aidan searches for blood and reunites with someone from his past. Josh considers taking his relationship with Nora further, while Nora meets a foe intent on revenge.

Nora and Josh meet a teenage runaway and debate how to handle the situation; Sally tries to make things right with Trent and makes a new mortician friend, Aidan and Henry search for clean blood in post - plague Boston.

Sally reaches out to Aidan as his struggle to survive becomes direr. Josh and Erin accompany Nora when she visits her family. Josh helps Aidan locate untainted blood.

Liam tries to pit Josh and Nora against Aidan, Sally gets closer with Max at the funeral home, and Kenny suspects that Aidan may be a vampire.

After an accidental encounter with someone from her past, Sally flees to Donna to try and make things right. Josh struggles with "raising" Erin. Kenny spurs Aidan's memories of when Bishop first made him.

Josh reconnects with Emily while he and Nora care for Erin. Aidan's clean blood supply is jeopardized when a sexy vampire makes Kenny an offer he can't refuse. Sally gets in touch with a friend from her past who's changed drastically.

Josh and Nora's newfound bliss is short lived when Liam returns with an agenda for Aidan. Sally tries to figure out what's wrong with her body and Nick hides a gruesome secret.

Aidan remembers his wife as he gets sicker. Sally struggles with a hunger that she hasn't felt before. Josh and Nora meet an older wolf as Josh deals with his changing circumstances.

Josh learns that Aidan made a sacrifice to protect him and Nora. Sally discovers Nick and Stevie's fates, and Aidan's date with Kat causes him to remember his wife and son.

Josh and Nora's search for Donna continues while Sally further deteriorates, and Aidan breaks Kenny out of the hospital to enjoy his final days as a human.

Sally prepares to battle Donna, Josh and Nora get ready for their wedding, and Aidan juggles his relationship with Kat while preparing for Kenny's "re-birth".

Josh and Nora face Liam for the final time, Sally deals with the consequences of her showdown with Donna, and Aidan must deal with Kenny now that he's turned into an abomination.