本片讲述一位曾精神受创的女子莫莉，在接受了一年多的治疗后终于出院了。为了开始新的生活，她搬到了新的公寓里。某天她听到了楼上传来了神秘的敲击声，而楼上的人却称没有听到任何声音。伴随着敲击声的次数越来越多，莫莉越发感觉到是有…

欧维，他59岁，脾气古怪，嫌东嫌西，带着坚不可摧的原则、每天恪守的常规以及随时发飙的脾性在社区晃来晃去，被背地里称为“地狱来的恶邻”。他每天一大早就四处巡视……

When Molly moves into her new apartment after a tragic accident, a strange noise from upstairs begins to unnerve her. As its intensity grows, she confronts her neighbors – but no one seems to hear what she is hearing.