Park Goo mutates into a man-fish due to side effects from an experimental drug. He receives heavy publicity and becomes a star. A conspiracy by a pharmaceutical company leads Park Goo to being possibly expelled from the world.
이광수
as Park-ku
박보영
as Ju-jin
이천희
as Sang-won
장광
as Mutant's Father
Lee Byung-joon
as Doctor Byeon
김희원
as Lawyer Kim
정인기
as Dong-shik
동방우
as Chairman
Choi Ji-ho
as Chairman's Secretary
강봉성
as Moon-gi
임성미
as Secretary
Kim Jin-goo
as Grandmother
