Two friends work as cleaners whose jobs are to clean homes and places where people have died or dead bodies are found. One day, they are tasked with cleaning a house where there were three dead bodies inside. Their job is to clean the corpses that have rotted. When they arrived there, they found that there are strange things happening and then they discover a strange book.。私生子弟弟从小到大一直利用读心术抢占了原本属于姐姐的一切,弟弟总是抢在女主前一步给出答案,每次答案和解题步骤都与女主一样最后害姐姐被逐出门。自立自强的姐姐,靠自己的聪明才智,赢得了人生,同时也揭发了私生子弟弟的恶行。。