Season 4 begins with Nora and Aidan living together in the woods; at the same time, Josh is stuck inside his wolf; and Sally finds herself trapped with Donna in a mysterious place where she learns more about their magical connection.
Someone from Aidan's past threatens to derail his relationship with Kat just as they are taking things to the next level; and Sally uses her newly acquired powers to try to free Josh from his wolf, but there are unintended consequences.
A new vampire boss with ties to Aidan makes life complicated; Josh encounters problems going back to his old life; and Sally's powers send her to a strange place in time where something horrifying appears to have happened to a mysterious little girl.
Aidan's vampire relationships continue as his human romance with Kat becomes more serious; a couple give Josh and Nora a glimpse into their possible future; and Sally asks an old friend for help solving the mystery of "Lil' Smokie."
Kenny joins Aidan for a night of drinking away sorrows; Josh and Nora throw a baby shower for their new wolf friends, but things quickly get out of hand; and Sally uses her time-jumping abilities to learn more about her roomies.
Sally receives news from someone in her past so travels back in time. Aidan struggles staving off his hunger whilst trying to remember what he once had with Suzanna. Josh's life takes a surprising turn putting his future with Nora into question.
Nora and Josh get in touch with an old friend who may be able to help them turn things around. Sally learns a lot after going after Donna to help her deal with her latest loss. Suzanna and Aidan have to face their past together.
Using magic gets Sally stuck in the past, and her efforts to return to the present end up changing the future for herself and her roommates.
Sally tries to right her wrongs and free herself from the past she's stuck in, but the only way she can figure on doing that is by magically transporting herself to the present and seeking the aid of an old foe.
Josh's efforts to get back in Nora's good graces lead him deeper into the world of wolves; Aidan and Sally grow closer than just good friends, at the same time his relationship with Suzanna takes a new turn.
Aidan helps Kenny get out of town; Sally and Nora help Josh conquer his wolf.
The roommates discover they are not the only ones having a hard time leaving the house.
Sally makes a huge sacrifice to keep her vision of Aidan killing Josh from coming true and that, in turn, changes Aidan's life forever as he fights to destroy the house's evil spirit. Meanwhile, Josh and Nora imagine their future roles as parents.