A cautious librarian raised by home security experts finds herself in a real-life adventure when a blind date mix-up leads her into an undercover FBI operation. Forced to pose as the girlfriend of Special Agent Josh, she helps him track down an art thief targeting the Saint Nicholas Ruby at a Christmas Eve charity ball.

小赖恩对黑暗的地方产生屯恐惧感，他哥哥戴尔对他的恐惧一点都不在乎，以为他在哗众取宠。一天他们父母去参加派对要到深夜才回家，戴尔答应在家好好看着弟弟赖恩，一场暴风雨导致停电，赖恩感觉到黑夜的恶魔终于来临了，可怕的事情开始发生，戴尔终于明白赖恩的恐惧，可为时已晚……