A life in free fall, a fractured memory, and a chilling SOS are all Iris Sailor has to find her estranged sister in a misty Northern California cove.

“My name…is Sam Sailor. Like the others…I am trapped here. And will die here.”

In 1984, Iris Sailor’s brutal fall on the ice unravels everything—her memory, doping secret, and figure skating career. Dumped by her coach/boyfriend and banned from competing, Iris finds herself utterly alone, wishing there was some way she could reconnect with her estranged sister, Sam.

When she returns home after her fall from grace, she finds an old postcard tucked alongside the rest of her mail. Strangely, the card advertising Nova Bay is postmarked September 14, 1981—the same day Sam disappeared. As she’s about to chuck it in the trash, Iris realizes there’s only one word scribbled on the back: HELP.

Tracing clues to a briny Northern California cove, Iris discovers a series of cassette tapes left behind by Sam, who narrates the story of her disappearance three years before. To uncover Sam's fate—and reclaim her own—Iris must piece together fractured memories and let go of the past before her sister and future are lost forever. But will she sink or swim under waves of crippling fear and dark family secrets?