JT and a SO team are sent to Detroit to address a situation with a radical Christian group that has taken over a mosque and taken hostages. Sonny must address legal concerns around the action due to FBI jurisdiction and the Posse Comitatus act.

On Christmas Eve, JT works on a humanitarian aid mission for an Afghanistan village that helped Delta several years ago. He finds the village confronting bad weather and an advancing Taliban force. Also, Sonny helps JT's father who needs a favor.