When it's known that the Uncle Toby's International Ironman series is coming to Baywatch, Mitch, Cody, Newman and the other men gear up for a big competition with the men from Australia. But C.J., Caroline, Neely, Donna, Jordan, Samantha and the other women feel all's fair and let them compete with them for the competition as well, which sets the stage for a series of pranks between the men and women. Complications arise when an old boyfriend of C.J.'s in the Ironman competition arrives and comes between her and Cody. Also, Manny lets himself be Cody's assistant to find out more about being an Ironman Champion.