Luna, a cruise ship chambermaid, has to quit her job to attend to her sick brother. While doing so, she discovers that her mother has gone missing a

露娜是一名游轮女服务员，为了照顾生病的弟弟，她不得不辞去工作。在此期间，她发现母亲失踪了，弟弟的病情也日益恶化。兄妹俩绝望地偷偷溜进一间空置的公寓，但很快便发现，这间名为“77号顶层公寓”的房子远非表面看起来那么简单。