Three years ago, passionate surfer Kenna Ward lost her two great loves. After her boyfriend drowned, she hung up her surfboard and swore off the water for good. But she is drawn back to the beach when her best friend, Mikki, announces her sudden engagement to a man Kenna has never met --- a member of a tight-knit group of surfers. Kenna travels to a remote Australian beach, entering a dangerous world far from civilization. She is tempted back into the surf, and drawn into the dazzling group and the beach they call their own. But this coastal paradise has a dark side, and members of the group begin to go missing. Kenna realizes that in order to protect Mikki and learn more about the surfers, she must become one of them…without becoming one of their victims.

When Milla accepts an off-season invitation to Le Rocher, a cozy ski resort in the French Alps, she's expecting an intimate weekend of catching up with four old friends. It might have been a decade since she saw them last, but she's never forgotten the bond they forged on this very mountain during a winter spent fiercely training for an elite snowboarding competition. Yet no sooner do Milla and the others arrive for the reunion than they realize something is horribly wrong. Detailed instructions await them inside the hotel: an icebreaker game designed to draw out their secrets and remind them of Saskia, the enigmatic sixth member of their group, who vanished the morning of the competition years before and has long been presumed dead.