A shocking discovery on a honeymoon in paradise changes the lives of a picture-perfect couple in this taut psychological thriller debut, a #1 New York Times bestseller—for readers of Ruth Ware, Paula Hawkins, and Shari Lapena.

Erin and Mark seem to have it all: he’s a successful banker, she’s a documentary filmmaker on the brink of a professional breakthrough; they’re young and in love, about to embark on their dream honeymoon to Bora Bora. But when, after a blissful day of scuba diving, they discover a mysterious bag filled with incalculable riches, their subsequent choices trigger a sequence of events that will change their lives—and their marriage—forever.