The doctor explains that the red butterflies are parasites that have been feeding on the young man. He says that if the parasites stay in the body for long periods of time, they will lead to organ failure and death. The doctor says that he's lucky that he is young and that he doesn't have to worry about this. The red butterflies ignore him and only attack the man who killed his father. He's a murderer, the doctor says, and he can live his life with that.