Craig tells Mitch a shocking secret that he has lymphoma when they become caught up in a high-risk adventure at sea starting when they get lost in a fog while paddle boarding and then get attacked by a shark. They manage to reach land only to end up as prisoners on a top secret military test range. Back at Baywatch, April cannot find the right time to tell Manny about her involvement with Craig. Meanwhile, Jessie tries to end J.D. and Cody's rivalry between them while they are in training for a triathlon by competing against both of them.