Imogen is an heiress, a runaway, and a cheat. Jule is a fighter, a chameleon, and a liar. Imogen is done pretending to be perfect, and Jule refuses to go back to the person she once was. Somewhere between the mansions of Martha's Vineyard and the shores of Cabo San Lucas, their intense friendship takes a dark turn. A masterful thriller from the author of the unforgettable We Were Liars.