San Diego Lifeguards Tony Park and Jeff Walker are sent on a week-long exchange program to Hawaii, where the killer waves are the least of their concerns. On their first case together, they join a team of local lifeguards on the island of Oahu, where a serial murderer is wreaking havoc on the community.

A scream shatters the jovial atmosphere of an after-hours work party, leading to the discovery of another murder, and the evidence suggests that the killer is one of our heroes’ new colleagues! Could the culprit be Weiss or Anzivino, their trusted partners for the week? Perhaps it is Kate Harris, Park’s spring fling, whose past relationship with the victim gives her a motive for revenge. What about Bob Culver, the lifeguard behind the bar with the murder weapon and the wolfish grin? Or Millie Haukea, who fills out her swimsuit to such an extent that Walker isn’t quite as cautious as he ought to be. Even Captain Lager, the boss, is not beyond suspicion.

Will Park and Walker fall victim to the North Shore Thrill Killer, or can they help the police restore justice to the island? There’s only one way to find out!