Captain Sonny Jennings and his core team of lifeguards monitor the dangerous Hawaiian waters; new lifeguard recruits compete to join.

A flash flood sweeps a young tourist away from her family and out to deep sea; Em takes a bold risk in hopes of rescuing her.

Em works to earn the team's respect when she is left in charge while Hina and Kainalu juggle multiple beachside emergencies.

College kids get trapped in a collapsed sandpit; Sonny, Will and Laka race to rescue people stranded after a shark attack.

The lifeguards experience the most dangerous ocean conditions the district has seen in years; Sonny assigns Laka as acting lieutenant.

The community comes together for Rocky's paddle out; Laka, Will and Kainalu try to save a beachgoer that accidentally speared his own foot.