When Stephanie Healy doesn't show up for choir practice, the team heads in to investigate and soon learns Stephanie had recently had a fight with her boyfriend. While speaking with Eddie, the team is shocked to learn that Stephanie used to be Stephen Patrick Healy. Convinced that the truth to what is happening in Stephanie's present lies in her past, the team investigates who Stephen was. Vivian has trouble hiding her worsening problems from the team, and is upset that Martin has been talking to Sam about his suspicions.

After a young woman named Agnes Deschamps goes missing, the team takes a look into her disappearance and learns that the young woman was believed to be a psychic. Sam has trouble accepting that one of their witnesses purports to be a psychic, although she is thrown when the woman correctly points out her problems with Martin. Jack, Martin and Danny pick up the extra hours with Vivian out awaiting heart surgery and together the team manages to track the young woman down after a supermarket parking lot kidnapping yeilds an unlikely clue.

Paige was last seen sneaking out of her office at the same time as an NYPD detective was asking her boss to direct him to Paige for a routine inquiry. To the team's surprise, the NYPD detective turns out to have been an imposter, causing them to question why Paige chose to run from this mystery man, what he wanted -- and if he caught up with her. Further investigation uncovers that the seemingly upstanding and socially conscious Paige was involved in a lucrative identity theft ring with close ties to a terrorist on a watch list who was recently seen in New York with her. Meanwhile, the remaining team members are gravely concerned about Vivian, who is undergoing open-heart surgery on that very day.

Vivian thinks about her recent surgical problems while searching for a missing woman with a terminal condition.