A cyclone hits Cape Mercy, leaving the town powerless and Dive Club member Lauren missing. Izzie and her father arrive to help with the clean up and Henry makes a shocking discovery.
While the town searches for Lauren, Dive Club begin their own investigation. Izzie finds Lauren's phone, which contains a hidden message suggesting her disappearance was no accident.
The girls break into Lauren's house looking for more information and find an old coin belonging to Hayden. Izzie finds a diamond brooch in Lauren's wetsuit.
Viktorya shares a family secret with Anna. Hayden tells Henry he's found a way to pay off his debts. Izzie steps up her relationship with Henry and Maddie finds a painting that changes everything.