It tells the story of a therapy group that is forced to confront the monsters of their past when an isolated weekend retreat tests their emotional resilience and ability to survive.
A daughter unravels her father's dark past after his body, missing for 36 years, is found at a horrific crime scene.
神秘的陆家别墅又叫蝴蝶楼，是出了名的凶宅。理疗师李晗（李梦 饰）、心怀鬼胎的阿伟（刘思维 饰）先后住了进来。此后，一桩桩离奇事件接踵而至：头绑血纱的红裙女人在房间游荡，面目扭曲的无眼男童在凄厉嘶吼……而阿伟因窥见更大利益贪念疯长，李晗却夜夜被梦魇缠身，更是意外撞见惊天豪门秘闻。与此同时，蝴蝶楼内的一场生死局也悄然布下，谁是待宰的羔羊？谁又会迈向更深一层的地狱？
