在这部背后有眼惊悚/恐怖片中,苏珊是一名事业有成的律师，和女儿妮可尔过着相依为命的生活。离异的生活让家庭的重担全都压在了苏珊的肩上，为此，她只能工作再工作，日子久了，她和女儿之间的关系难免渐渐疏远。一天，苏珊如同往常一样下班回家，却发现妮可尔失踪了，而家里的女佣竟然死在了浴室之中。
恐惧之中苏珊接到了一个神秘电话，电话那头的正是绑架妮可尔的罪魁祸首，他威胁苏珊必须按照他的指示行动，而他早已经在房子里设置了监控，否则她的女儿将小命不保。聪明冷静的苏珊利用绑匪的视觉死角和外界取得了联系，她身为警察的前夫和同事们马不停蹄地感到了苏珊家，开始了紧张刺激的营救行动。
Suzanne, a single parent and succesful lawyer, returns home to find her daughter missing. About to call the police, she is confronted by a disembodied voice warning her that if she attempts to leave or seek help, her daughter will die. Suzanne discovers she is being monitored through surveillance cameras operated by the tyrannical voice. The voice informs her that in order for her daughter to live, Suzanne must commit suicide. In a race against time Suzanne must think of a scheme to get a message to the outside world...
