Yeong-ha is a teenager living with her mother who has recently remarried. After the high school exam, Yeong-ha is home together with her step-father and encounters something unexpected. After thinking it over, she decides to tell her mother what happened.
A self-conceited story about Jae-yoon, a married film professor in his 40's who tries hard to seduce an assistant that he finds attractive. He thought his wife and assistant were both his, but things were not as they seemed.
Shot in Busan, Shadow Island is the name of a location as well as the main character’s name. The film explains the legacy of violence passed down through three generations. The lives of a murderous father, a son addicted to violence, and the victims of violence intertwine into a surprising finale. As the film shifts through the past and present, it reveals a painful family history that eats away the soul and leads to a burdened fate of self-destruction.
"Can't we all just live together?" It would be nice, but for the twin brothers Il-do and Yi-do, it's just a wishful thought. Born under a cursed fate due to their parents' original sin, one must die for the other to live. To avoid this, they have deliberately cut off contact. However, when Yi-do, who works for a gang, gets stabbed, Il-do somehow hears about it and rushes to donate blood, saving his brother's life. But instead of gratitude, Yi-do attacks him the moment he sees him.
