Rachel, a rookie cop, is about to begin her first nightshift in a neglected police station in a Scottish, backwater town. The kind of place where the tide has gone out and stranded a motley bunch of the aimless, the forgotten, the bitter-and-twisted who all think that, really, they deserve to be somewhere else. From his basement dungeon a charismatic loner begins to take over the minds of his fellow inmates and those of the police officers. He influences them to bend to his evil will and their latent inner demons explode in a blood-soaked night of mayhem.
