Nina and Simon are the perfect couple. Young, fun and deeply in love. Until they leave for a weekend at his family’s cabin in Vermont, and only Simon comes home.

Cat lives in Los Angeles, far from 36 Westeryk Road, the imposing gothic house in Edinburgh where she and her estranged twin sister, El, grew up. As kids, they invented Mirrorland, a dark, imaginary place under the pantry stairs, full of pirates, witches, and clowns. These days, Cat rarely thinks about their childhood home, or the fact that El now lives there with her husband, Ross. But when El mysteriously disappears after going out on her sailboat, Cat is forced to return to 36 Westeryk Road, which hasn’t changed in twenty years.

As kids, Emily and Chess were inseparable. But by their 30s, their bond has been strained by the demands of their adult lives. So when Chess suggests a girls trip to Italy, Emily jumps at the chance to reconnect with her best friend.

Hannah awakens to carnage, all mangled metal and shattered glass. After she was evacuated from a secluded boarding school during a snowstorm, her coach careered off the road, trapping her with a handful of survivors. They’ll need to work together to escape—with their sanity and secrets intact. Meg awakens to a gentle rocking. She’s in a cable car stranded high above snowy mountains, with five strangers and no memory of how they got on board.

Growing up in a beautiful house in the English countryside, Katie Shaw lived a charmed life. At the cusp of graduation, she had big dreams, a devoted boyfriend, and a little brother she protected fiercely. Until the day a violent stranger changed the fate of her family forever. Years later, still unable to live down the guilt surrounding what happened to her brother, Chris, and now with a child of her own to protect, Katie struggles to separate the real threats from the imagined. Then she gets the phone call: Chris has gone missing and needs his big sister once more.