In the aftermath of a storm, Maddie, Stevie, Anna, and a new friend launch their own search for Lauren and her boat, Indy.
A radio alert leads to a covert assignment for Izzie and the Dive Club; an old flame grapples with despair -- and shares a bit of Indy intelligence.
Lauren's chilling message makes Maddie, Stevie, Anna, and Izzie consider a far more sinister truth; the girls get ready for a posh party.
Stevie presses Hayden for answers and searches for a critical piece of the puzzle; across town, Izzie works hard to face her diving fears.
As Cape Mercy prepares for a fundraiser, the girls attempt to connect with a mysterious messenger; Sea Dog's actions spark intrigue.
The Dive Club's captive shares more about Lauren's ambitions and leaves Maddie feeling star-struck; a rescue mission takes an unexpected turn.
The girls gather for a somber celebration; Stevie speaks her truth, and a startling revelation changes Izzie's perspective; Anna breaks free.
Leonid details the rich history of the Romanovs for the Dive Club, triggering interest in a high-risk, high-reward mission.
The Dive Club navigates a rough patch; Anna receives hopeful news; Stevie defends precious cargo; Izzie and Maddie crack the code on a new adventure.
As Cape Mercy prepares for Salvation Day, Anna has a tense conversation with her mother and accepts a life-changing gift from her grandmother.
Maddie confides in Leonid and dives deeper into her quest for answers; at Salvation Day, a surprising signal restores hope for the Dive Club.
A frantic dash leads to even more danger for Maddie, Anna, Stevie, and Izzie; they strive to keep their composure in a storm of twists and turns.