Sam is arrested for murdering a woman, but Callen and Granger work to clear his name. Meanwhile, Kensi and Deeks discover a link between the victim and a student from Sam's past.
Hotch's stab injury makes him have visions of Hayley and Foyet; meanwhile the BAU looks for a missing teenager.
An cold case unsolved for twenty years about the disappearance of a young boy suddenly heats up again when the main suspect in that long ago crime is found dead.
Zoe encourages Rose to enter Bluebell's annual Miss Cinnamon Cider Pageant even though Lemon's younger sister, Magnolia, is the clear favorite to win. With Zoe coaching Rose and Lemon coaching Magnolia, the rivalry rises to a whole new level. Flashbacks reveal some of the history behind Lemon's relationship with her mother and the details of when Lemon and Lavon first realized they had a connection.moreless
Five-0 is investigating the murder of a volleyball coach which leads to new evidence about one of their own. Chin and his former fiancee Malia find themselves spending time together.
The potential legal trouble for Brenda escalates as Captain Raydor's interview questions about the Turell Baylor murder intensify, along with a suggestion that Brenda does not like.
Meanwhile, the team's next case, that of a missing nine year old boy, hits very close to home for Lieutenant Tao because the missing boy goes to the summer camp where the Lieutenant's 16-year old son works. Because of the connection, he ends up as the lead investigator on the case.
Dylan faces a difficult pro bono case. Meanwhile, Liam lies to bring on a new client for the firm and Addy speaks up to her irritating boss.
While on their separate vacations, each member of the BAU receives a clue from a psychopathic killer who challenges them to save his next victim.