Madison discovers that her instincts are growing strong as she slowly starts to decipher the web of Marcus' memories. After Jack learns that Gary hasn't been entirely truthful, he coerces him into making a terrifying confession. Richard finally comes face-to-face with Marcus.
In the season finale, Jack discovers the alarming depth and breathtaking scope of the all-powerful organization to which he's lost Amy. Meanwhile, Marcus and Madison engage in a fatal struggle and Richard is forced to go on the run but he recruits an unexpected partner along the way.
A gruesome discovery buried in Jack's backyard incites him to make one last attempt to bring Amy home. Rose remains haunted by a tragedy from her distant past and abducts a lowly waiter whom she's certain will have answers. Gary has finally realized how to expose the corruption behind Qui Reverti, but it demands an unthinkable sacrifice.
Rose confronts Jack to explain the cause of Amy's recent strange behavior. Amy's past - which she has worked so hard to suppress and deny - has come back to haunt her and the only way to protect Jack may hurt him the most. Meanwhile, Richard discovers a secret about Rose that could destroy her ascent onto The Nine. Shepherd himself is skating on thin ice as Madison continues to evade his grasp.
Jack Whelan is a former LAPD detective who is asked to investigate strange occurrences related to a string of attempted suicides. In Whelan's case, this process destroys his marriage when his wife's body is taken by an intruder. A serial killer named Marcus Fox comes back to life in the body of a little girl. Both souls fight for control, causing their memories to become confused.