Follows the dedicated, heroic and adrenaline-seeking lifeguards of the North Shore of O'ahu, as they save people's lives in the difficult and often life-threatening conditions of Hawaii's Seven Mile Miracle.
Cast: Robbie Magasiva, Arielle Kebbel, Adam Demos, Kekoa Kekumano, Zoe Cipres, Alex Aiono, Sea Shimooka, Hayley Malia Johnson, Ka'enaaloha Watson, Ian Anthony Dale, Taylor Cooper, Christina Souza, Matt Corboy, Shawn Hatosy, Nakoa DeCoite, Ka'ano'i Chandler, Kahimoku Chandler, Bradley Anderson
Hina and Kainalu assist the US Coast Guard in searching for two missing snorkelers left behind in the middle of the Ocean. Meanwhile, Captain Sonny takes matters into his own hands about Vince. Will and Julie meet for coffee and Em receives a job offer from a very rich person. Laka and the team attend Ocean's graduation party.
While monitoring the beach, Laka and Will notice a toxic smell coming from a van and discover a kid unconscious and surrounded by drug paraphernalia; Em befriends a disabled veteran; Hina finally confesses her feelings to Kainalu.
Will and Em race to rescue a windsurfer that wipes out and suffers cardiac arrest; Capt. Sonny reunites with Ocean over a family lunch and Em realizes her mom is back to her old ways; Hina tries to hide her jealousy over Kainalu's new relationship.
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; Laka searches for a missing local.
The team searches for two missing teenagers that ditched school and find themselves stranded in the middle of the ocean, after they realize they stole a cracked canoe. Meanwhile, Will does not get along with District 7's new team member. Em receives a surprise visit from her estranged mother.
The team races to rescue unresponsive cliff jumpers; Hina tries to navigate family issues; Will and Em hope to get over each other by rebounding with other people.
Captain Sonny and the Ocean Safety team face their most dangerous rescue yet when a literal minefield is discovered on the ocean floor. Meanwhile, on the beach, a hugely popular influencer will do anything to capture viral content for her massive following.
The team is on high-alert when a tsunami advisory is sent out following an earthquake. As the state of Hawaii is under an evacuation order, Captain Sonny has bigger issues when Ocean skips school and he can't find her.
Em and Will's relationship struggles as they navigate the return of his fiancée; Kainalu asks Laka for help; the team races to rescue a group of locals involved in a serious accident while riding an inflatable Supsquatch.
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.
Christmas cheer is in the air as the lifeguards prepare for their annual holiday toy drive; 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.
Sonny, Em, Will and Laka race to the beach to find missing paragliders that plummeted into the ocean by a violent down draft.
Hawaiian lifeguards respond to an influencer swept into the ocean while filming, Kainalu and Hina set boundaries at home, Will's fiancé doesn't want Em at their wedding, and Jenn agrees to a date.
The community comes together for Rocky's paddle out; Hina thinks about switching districts.
Lifeguards face hazardous ocean conditions. Sonny appoints Laka as acting lieutenant. Kainalu's father urges him to leave shift for his political campaign.
College kids face danger in a collapsed sandpit. At sea, rescue efforts after a shark attack. Firefighter candidate Will awaits job results. Em attracts Fire Captain's interest. Hina pursues Kainalu.
Em strives for team respect as acting boss. Hina and Kainalu handle beach emergencies. Will's fiance visits him at work. Sonny confides in ex-lifeguard about nephew's loss. Laka flirts with EMT Jenn.
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 in hopes of rescuing the lost-at-sea tourist.
At Oahu's North Shore, captain Sonny Jennings and his core team of lifeguards monitor the dangerous Hawaiian waters. Meanwhile, the new lifeguard recruits compete to join Sonny's district.