圣诞节应该是和平与欢乐的家庭团聚的时刻。 但是当马特和他的妻子凯伦突然出现在他疏远的兄弟史蒂夫的家中庆祝节日时，他们却得到了一个可怕的惊喜：被困在地下室的是一个男人。 但不只是任何人。 史蒂夫相信他的人质就是魔鬼本人。

Christmas is supposed to be a time for peace and joyful family reunions. But when Matt and his wife Karen show up unannounced at the home of his estranged brother Steve to celebrate the holidays, they are instead greeted with a horrifying surprise: trapped in the basement is a man. But not just any man. Steve believes that his hostage is none other than the devil himself.