在这部墙后低语惊悚片中,初到柏林，苦于找不到落脚之所的大一新生马丁意外得到他人帮忙，住进了一间小公寓。据称公寓的前房客已失踪，房间里还留着他大堆东西。简单收拾完屋子之后，马丁正在为自己终于可以睡在床上而庆幸时，他发现白天素未谋面的古怪女房东就跟他一墙之隔，从那边传来的娇羞喘息声，勾起了他内心的无限好奇……
Martin leaves his protective parents' home and comes to Berlin as a law student with high hopes. He finds a tiny, run-down flat in a strange, dark apartment block, from which the previous tenant has disappeared without a trace. Having no luck with social contacts at the university, Martin quickly falls for his mysterious landlady Simone, who lives just next door behind a thin wall. Hoping to find trust and intimacy, Martin loses himself in the house's disturbing world of sex and violence. Deep in the walls, Martin discovers the true horror of his first love.
