Five-0 struggles to stay a step ahead of a major tsunami that has the island evacuating its shores as they investigate the disappearance of the head of the Tsunami Warning Center.

Gov. Denning assigns Officer Lori Weston to Five-0 to make sure McGarrett and team follow the new rules set by him and also apply her excellent profiling skills to the task force. Meanwhile, as Five-0 investigates the kidnapping of a teenage paddleboard champion, Internal Affairs Capt. Vince Fryer continues his interrogation of Kono.

McGarrett and the Five-0 search for a busload of kidnapped school children as well as the people responsible.