Sean, J.D. and Kekoa travel to the Big Island to help with the extra work caused by the Ironman Triathlon. They soon have a run-in with former lifeguard Jessie Owens, who is also competing in the Triathlon and has new infant son with her. This causes some awkwardness in J.D., and slight jealousy in Kekoa who suspects that J.D. never got over her. Meanwhile, Sean has an encounter with a mysterious woman while on a nature hike on the western shore of the island.