As the gang hatches an illicit scheme to get to the bottom of the deep-sea mystery, John B confronts Sarah while Pope jumps at the chance for revenge.

With his options dwindling and enemies closing in, John B looks for an exit plan. Sarah feels pressured to pick a side. Pope lets his emotions out.

An island crawling with law enforcement and a looming tropical storm are just two of the obstacles facing John B as he tries to make his escape.

JJ cooks up a risky plan to help out John B. Pope hunts down information about the key. Kiara and Sarah both deal with family fallout over the Pogues.