變異人(ディクロニウス)，人類的突變體，頭上生有兩隻角，具有特殊的第 6 感以及透明的4隻手，擁有淘汰人類的能力。由於變異人的能力太過危險，因此政府特別設立設施隔離以及研究變異人。
但真的只是單純的過度危險而設施隔離嗎?
但是，一次偶發的意外，變異人少女Lucy打破設備，屠殺警備人員後逃出研究所。然而，Lucy在逃出途中受到子彈擊中腦部而墜海漂流至鎌倉，後來被偶然在海邊發現她的男主角和其表親留寄居在楓莊園.....
秀悅，反腐敗搜查科警監，高中學歷卻是有能力的員警幹部。只為出人頭地的秀悅只接手上級喜歡的案子，給他們最想要的結果，卻對一些不義之事睜一隻眼閉一隻眼。臨近晉升，沒有靠山的秀悅再次面臨將機會拱手讓人的危機。國會議員都有坤的出現讓秀悅再次看到了晉升的希望，就在關鍵時刻充滿正義感卻是瘋子的Ｋ突然出現，秀悅的人生完全停滯！「壞傢伙」秀悅與「瘋傢伙」Ｋ的相遇，結局會是……
Niwa Daisuke is your average teenager, until his fourteenth birthday. He tries to declare his love to the girl of his dreams, but fails. Suddenly, whenever he thinks about this girl he turns into the legendary phantom thief known as Dark Mousy. Daisuke's mother, very much aware of this, makes him turn into Dark and steal valuable works of art for a purpose unknown to Daisuke. As the story unfolds, he learns why, and about his classmate who seems to have the same ability.
時值 1970 年代末期，一名遭到指控的連續強暴犯宣稱自己的犯行源自多重人格，此舉引爆浩大的法律戰，引起全美關注。
A young woman whose childhood was so harrowing to her that she developed at least 13 different personalities.
