1Chapter 1: Endurance
On the shores of Cape Mercy, a skillful group of teen divers investigate a series of secrets and signs after one of their own mysteriously goes missing.
2Chapter 2: Flower of the Sea
While the town searches for Lauren, Dive Club begins their own investigation. Izzie finds Lauren's phone, which contains a hidden message suggesting her disappearance was no accident.
3Chapter 3: The Rising Sun
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.
4Chapter 4: SS Gothenburg
Dive Club discovers that Hayden's coin has some significance and that Lauren was communicating with a mysterious person named LK
5Chapter 5: The Adelaide
It's the day of the cabaret fundraiser and Dive Club discover who the mysterious LK is.
6Chapter 6: Dimitri Donskoii
Dive Club and LK receive a distress call and embark on a rescue mission. Could it be Lauren?
7Chapter 7: Mary Celeste
With the town of Cape Mercy believing Lauren is dead following the discovery of her sailing jacket, a memorial is held in her honor.
8Chapter 8: RMS Republic
Dive Club and Leonid dive the dangerous Russian shipwreck causing dire consequences.
9Chapter 9: Nemesis
Dive Club learns the significance of Hayden's coin, which takes them on another wreck dive.
10Chapter 10: Admella
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.
11Chapter 11: Black Swan
The Salvation Day celebrations begin, and the town is in good spirits. All that changes when a SOS flashes out from the lighthouse. Is it Lauren?
12Chapter 12: Queen Anne's Revenge
The truth is pieced together as one of the girls is forced to choose between friends and family.