Hobie's new friend, Isaac, is a frustrated and angry young kid who will do almost anything to get his distant, workaholic father's attention, like trying to swim down a dangerous offshore reef cataract called "the shredder." Meanwhile, Caroline befriends Cory, an ex-jockey pretending to be blind after an accident during a horse race. She encourages him to race again to help regain his confidence. Then an old rival of Cory's pushes him into a grudge horse race at the beach to test the will of the other.

Matt Brody returns to Baywatch to try to make up his lost relationship with C.J. But things take an unexpected turn when a group of ruthless modern day pirates take a millionaire couple hostage and place them under water on the wreck of the sunken oil platform with handcuffs and air for six hours. When Matt and Neely speed by in their Scarab motorboat, the pirates take them hostage as well. Meanwhile, Joey's past may jeopardize her adoption to Mitch when a professional beatnik criminal, named Trapper, recruits an unwilling Joey to commit a burglary job as payback for her mother's past scams against him.