Maeve Martin arrives at the High Water Center for the Arts, a gorgeous lodge nestled deep in the Rocky Mountains, determined to do one thing: begin her own dance company. A retired performer and mother of two, time is running out for her to find her feet again after the collapse of her disastrous --- and violent --- marriage. But when an avalanche strikes, Maeve finds herself trapped with six other guests. At first, there’s a sense of camaraderie. But as the days pass and the storm rages on outside, tensions start to run high. Then the first guest meets an unspeakable death. Followed by another. Soon Maeve must admit how little she knows about these strangers --- and how useless a locked door is if the darkness is already inside.

Rookie crime beat reporter Evie Jones is haunted by the unsolved murder of her best friend, Lianne Gagnon, who was killed in 1982, back when both girls were 11. The suspected killer, a repeat offender named Robert Cameron, was never arrested, leaving Lianne’s case cold. Now 21 and living alone for the first time, Evie is obsessively drawn to finding out what really happened to Lianne. She leans on another childhood friend, David Patton, for help --- but every clue they uncover seems to lead to an unimaginable conclusion.