When cocaine and weapons are stolen from the evidence lock-up, the squad must investigate the Nine-Nine itself.

Meredith and Carina question DeLuca’s uncharacteristic behavior when he volunteers to perform a life-threatening task during a blizzard. Meanwhile, Bailey tries to help Joey with his future, while Richard trains a new intern at the hospital.

Rollins' sister stirs up trouble and a possible SVU investigation when she reports a doctor who trades prescription painkillers for sex.

Amy organizes a community service event, but it's jeopardized by Jeff's return and Glenn's desire to help his co-workers. Sandra confronts Jonah about his strategy for soliciting donations. Garrett tries to prove his intelligence to Dina.

Ambrose pursues Jamie through New York City and tries to prevent another homicide.

Jimmy welcomes comic John Mulaney and a musical performance by Bad Bunny & Sech.