姬丝汀为了庆祝男朋友泰勒30岁生日,决定带他及另外两对情侣,玩时下流行的「密室逃脱」游戏。玩家会被锁在一间密室里,透过房内线索限时一小时解谜并找到逃出方法。一开始大家都兴致勃勃,但当时间流逝,难度提高,玩家一个接一接地死去,始发现他们一直玩的不是游戏,而是命!。A young girl lives with her mother in an isolated mountain cabin. Mother dies, the girl also has a child. No father is present. A friendship is formed with another woman but things start to become twisted. Paranoia and delusions follow。