最近搬进新家的秀贤(申惠善 饰),通过二手交易APP买了一个二手洗衣机,却发现洗衣机无法使用。秀贤对卖家不负责任的态度感到生气,因此发表评论指控卖家是个骗子。没想到秀贤周遭自此发生许多怪事,甚至还发现了一具尸体……The protagonist who reports the seller of a broken washing machine to the police, only to realize he's a psychopathic serial killer. It makes one rethink the purchase of second-hand items via online apps