While vacationing mainlanders and island locals revel in the cool waters and the sunny beaches of Kauai, Hawaii, a missile test goes off-course, destroying a local tourist boat and killing several passengers. Could sloppy science be at fault, or could sabotage be the culprit?

When the investigation leads nowhere, Kaia Ohana, island resident and dolphin researcher, is called upon by Jesse Matthews, head of security at the naval base, to help. Aided by dolphins Kaia's been teaching to communicate, Kaia and Jesse must try to stop a terrorist before he can strike again.