A frantic dash leads to even more danger for Maddie, Anna, Stevie and Izzie. Can they keep their composure in a storm of shocking twists and turns?

Maddie confides in Leonid and dives deeper into her own quest for answers. At Salvation Day, a surprising signal restores hope for the Dive Club.

As Cape Mercy prepares for Salvation Day, Anna hosts a tense conversation with her mother — and accepts a life-changing gift from her grandmother.

The Dive Club navigates a rough patch, Anna receives hopeful news, Stevie defends precious cargo, and Izzie and Maddie crack the code on a new adventure.

Past meets present as Leonid details the rich history of the Romanovs for the Dive Club, triggering interest in a high-risk, high-reward mission.

The girls gather for a somber celebration, Stevie speaks her truth and a startling revelation changes Izzie's perspective. Later, Anna breaks free.

The Dive Club's captive shares more about Lauren's ambitions — and leaves Maddie feeling star-struck. A rescue mission takes an unexpected turn.

As Cape Mercy prepares for a dazzling fundraiser, the girls attempt to connect with a mysterious messenger, and Sea Dog's actions spark intrigue.

Stevie presses Hayden for answers and searches for a critical piece of the puzzle. Across town, Izzie works hard to face her diving fears.

Lauren's chilling message makes Maddie, Stevie, Anna and Izzie consider a far more sinister truth. Meanwhile, the girls get ready for a posh party.

A radio alert leads to a covert assignment for Izzie and the Dive Club. Elsewhere, an old flame grapples with despair — and shares a bit of Indy intel.

In the aftermath of a treacherous storm, Maddie, Stevie, Anna and a new friend kick-start their search for Lauren and her beloved boat, Indy.