An undercover cop chasing a drug suspect mistakenly shoots an innocent teen, and Cal is hired to determine the man's intentions. Meanwhile, Loker's lie during a recent Ponzi-scheme investigation could come back to haunt him (and Torres as well) when Cal tells them that they'll be deposed in a lawsuit over the matter; and Cal's suspicions that Foster's husband is having an affair are raised anew when he sees him again with the woman he had seen her with before.

Following a terrorist attack outside Washington, D.C., FBI agent Reynolds enlists the Lightman Group to find the perpetrators. Then the case becomes personal for a member of the team. In addition, Cal and Zoe fear that their daughter could be in danger.