Jane and Lisbon decide to keep their new relationship a secret from their colleagues as they investigate the murder of an undercover agent. Also, young, ambitious agent Michelle Vega joins the team.
Lisbon goes undercover as a prison inmate in order to get a convict to turn on her boyfriend, who is the leader of a high-end car theft ring.
Jane and Lisbon travel to Beirut where they must work with Jane’s familiar adversary, Erica Flynn, who agrees to help the FBI apprehend her boyfriend, a courier for terrorist organizations, in exchange for amnesty for her past crimes.
The team investigates a murder linked to a counterfeit diamond operation, but an illness forces Jane to direct his colleagues from the office as he recuperates. Meanwhile, Abbott is concerned that transgressions in his past could harm his wife’s chance to obtain a prestigious job in Washington, D.C.
A chance encounter with a military colonel leads Jane to believe the soldier is hiding something, leading him to dig into the closed murder case of the man’s wife.