由于小时候的交通事故,“我”的性格和个性因星期几而不同,他们以星期几的名字互相称呼,其中“星期二”是最朴素无聊的存在,是从其他星期开始被强加家里打扫等麻烦事的角色。但是,有一天,忙了整天后躺在床上的“星期二”在星期三醒来。我心中的“星期三”消失了,“星期二”歌颂星期三,但日常生活渐渐变成了恐怖。He looks like a normal and well-adjusted young man who is no different than anyone else. There is not a reason for anyone to suspect this man is different or suffers from an internal rage. he, however, harbours no less than seven different personalities. There is a rhyme to this idiosyncrasy however. The man's seven personalities appear according to which day of the week it is. The personalities know and study one another. The man keeps a diary.