College kids get trapped in a collapsed sandpit; Sonny, Will and Laka race to rescue people stranded after a shark attack; Will learns if he made the cut for the firefighter job he has been pursuing.
 

The North Shore community comes together for Rocky's paddle out; Hina thinks about switching districts; Laka, Will and Kainalu try to save a beachgoer that accidentally speared his own foot; romance heats up between Sean and Em.