Rescue: Hi-Surf, Mauka To Makai

A drama-packed premiere. Heavy-water lifeguards patrol and protect the North Shore of O'ahu.

A flash flood sweeps a young tourist away from her family and out to deep sea; going against Sonny's wishes, Em takes a bold risk and places her own life in danger.

Em strives for team respect as acting boss. Hina and Kainalu handle beach emergencies. Will's fiance visits him at work. Sonny confides in an ex-lifeguard about his nephew's loss.

A group of college kids get trapped in a collapsed sandpit. Sonny, Will, and Laka race to rescue people stranded after a shark attack; Em catches the attention of Fire Captain Sean Harimoto.

The North Shore lifeguards experience the most dangerous ocean conditions the district has seen in years. Kainalu's father pressures him to leave his shift and help him with his campaign.

The swell has settled down, and the North Shore community comes together for Rocky's paddle out. Hina thinks about switching districts and Em tries to console her after the recent tragedy.