朱利安在一间办公室工作，和他病残的母亲和女友住在战前的巴黎公寓里。他觉得两个女人占了他的便宜，晚上，他梦见性和暴力。与此同时，一名杀人犯在巴黎逍遥法外，杀害妇女。有一天在地铁里，朱利安相信他从梦中看到了一个谋杀的受害者；神秘的美把他带到一个古老的购物中心，那里有许多奇怪的人物，他在那里遇到了妓女比切特。这位独立、自信的年轻女子与职员开始了一段恋情。但是后来朱利安在玻璃屋顶的拱廊里目睹了一场真正的谋杀……这部关于女性欲望和窥视欲望的色情神秘惊悚片结合了黑色电影元素和优雅奢华的元素。真正的巴黎地铁的壮观通道通向一个超现实的幻想世界，提升了长期以来被禁止的女性想象中非法方面的幽灵。再加上精致的构图，玻璃天空变成了一个感性的电影童话。

Julien works in an office and lives with his invalid mother and his girlfriend in a pre-war Paris apartment. He feels like the two women take advantage of him and at night, he dreams of sex and violence. Meanwhile, a murderer is loose in Paris, killing women. One day in the metro, Julien believes he sees a murder victim from his dreams; the enigmatic beauty leads him into an old shopping arcade peopled by strange figures, where he meets prostitute Bichette. The independent, confident young woman starts an affair with the clerk. But then Julien witnesses a real murder in the glass-roofed arcade…