Rescue: HI-Surf

Two rookie lifeguards, Hina and Kainalu try out to be on the team, as Sonny and his family are still grieving the loss of his nephew and Em and Will's past romance is revealed.

Sonny, Em, and Will race into action to save a young tourist, and Em places her own life in danger. Laka supervises rookies Kainalu and Hina's first day on the job.

Em is left in charge, Hina and Kainalu have beachside emergencies, and Will's fiancé visits him at work. Sonny opens up about losing his nephew. Laka flirts with EMT Jenn.

Two college kids get trapped in a collapsed sandpit; Sonny, Will, and Laka race to rescue people stranded; and Will learns if he made the cut for the firefighter job.

The lifeguards of the North Shore experience the most dangerous ocean conditions the district has seen in years. Sonny assigns Laka as acting lieutenant as Em has the day off and joins Jenn to catch some massive waves.

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.

Will, Laka, and Em try to rescue an influencer. Kainalu and Hina discuss setting boundaries, and Mayor Emerson makes good on his word. Meanwhile, Will breaks news to Em.

Sonny, Em, Will and Laka try to find missing paragliders; Kainalu invites Hina to a party with his ex-girlfriend; and Em and Will face temptation.

While surfing, a local grandpa has a heart attack and is rushed to the hospital. Sonny tells Laka he is not ready to become a lieutenant, and Laka does not take the news well and spirals at a bar.

The team races to the rescue in the aftermath of an ATV accident. Romantic tensions are high between Em and Will as well as Kainalu and Hina.

Em and Will's relationship struggles as they navigate the return of his fiancé. Kainalu asks Laka for help. The team races to rescue a group of locals involved in a serious accident while riding an inflatable Supsquatch.

As the state of Hawaii is under an evacuation order following a tsunami advisory, Captain Sonny has bigger issues when Ocean skips school and he can't find her.

Captain Sonny and the Ocean Safety team face their most dangerous rescue yet when a literal minefield is discovered on the ocean floor. Meanwhile, an influencer will do anything to capture viral content for her massive following.

Captain Sonny, Laka, and Kainalu race to rescue unresponsive cliff jumpers. Hina tries to navigate family issues. Meanwhile, Will and Em hope to get over each other by rebounding with other people.

The team searches for two missing teenagers that ditched school and find themselves stranded in the middle of the ocean. Meanwhile, Will does not get along with a new team member. Em receives a surprise visit from her estranged mother.

Em takes the day off to spend time with her mom but races into action when she comes across an unresponsive cave diver. Will confides in Vince about his personal anger issues. Meanwhile, Laka searches for a missing local.

Will and Em race to rescue a windsurfer that wipes out and suffers cardiac arrest. Meanwhile, Sonny reunites with Ocean, and Em's mom is back to her old ways. Plus, Hina tries to hide her jealousy over Kainalu's new relationship.

While monitoring the beach, Laka and Will discover an unconscious man amid drug paraphernalia. Em meets a disabled veteran, while Hina reveals her feelings to Kainalu. Captain Sonny learns about Vince.

Hina and Kainalu help search for two missing snorkelers. Meanwhile, Captain Sonny takes matters into his own hands about Vince. Will and Julie meet for coffee and Em receives a job offer.