Allie, Stacie, Diana, Emily and Gail have been by each other's sides for as long as they can remember. The Fierce Five. Best friends forever. But growing up has meant growing apart. And little white lies have grown into devastating secrets. When Gail invites the increasingly estranged friends to reunite at her Scottish cabin, it could be the opportunity to mend old wounds and heal the cracks in their friendship. But when a freak snowstorm rocks the cabin and one of the girls is found dead on the ice, their weekend away becomes a race against time - and each other - to get off the mountain alive. And in the end, whose story can you trust, when everything was founded on lies to begin with?