An imposing, isolated hotel high in the Swiss Alps is the last place Elin Warner wants to be. But she's taken a leave of absence from her job as a detective, so when she suddenly receives an invitation to celebrate her estranged brother's recent engagement, she has no choice but to accept.
Arriving in the midst of a threatening storm, Elin immediately feels on edge. Although it is beautiful, something about the hotel, recently converted from an abandoned sanatorium, makes her nervous - and her brother Isaac.
And when they wake up the next morning to find his fiancée, Laura, missing, Elin is even more worried. With the storm cutting off access to and from the hotel, the longer Laura remains missing, the more the remaining guests begin to panic.
But no one has yet realized that another woman has gone missing. And she is the only one who could have warned them about the danger they are all in...
