Overview
Evil Twin is a 2007 South Korean horror film.
When an accident claims the life of a young girl, during the same incident her twin sister fell into a coma and awakens 10 years later. Many deaths follows her recovery, and she seemingly takes on her sister's personality traits.
Plot
The movie begins with a young woman being strangled by a man. The man strangling her is accusing her of murder. A series of flashbacks show two little girls playing on a bridge and falling into the water.
Three men are sitting and drinking, asking each other what they would do if they saw a ghost. Two of the men make fun of the third about his stuttering and cowardice. The stutterer says that they would be scared too if they met dead Hyo-jin. The third man makes an excuse and leaves. While walking home, he glances nervously at a bridge and pretends not to see it. He then sees a woman with long hair covering her face. Frightened, he attempts to pretend he doesn't see her either but the woman appears in front of him.
A young woman, So-yeon, wakes up from a creepy dream in the hospital, finding her mother beside her. The doctor informs them that she has lost her memories. So-yeon is taken home and pampered, tended to by a servant who tells her that she has been in a coma for ten years. So-yeon has a vision of drowning and develops chest pains after overhearing of a man drowned in a ditch. She goes directly to where the body was, arousing the curiosity of her servants. Far in the distance, she sees the body being carried away: the stuttering man from earlier.
From Wikipedia (CC BY-SA 4.0).