Jang Woo and Eun Ji are orphaned siblings living in a small seaside town. They are very close, having only each other to rely on after their parents passed away. Jang Woo is saving up to move to the city so that his younger sister Eun Ji will have better opportunities once she graduates from high school. But one day Eun Ji suddenly disappears, and she turns up dead three days later, her body bruised all over and dumped in a large bucket of water at their washhouse. No witnesses and evidence to the crime can be found. Jang Woo turns to shamanism, but during the ritual to send Eun Ji’s spirit to heaven in peace, he notices a suspicious man and takes the latter’s behavior as Eun Ji’s hint from the afterlife to find her killer. Shi Eun has been ostracized by the townspeople for her mysterious psychic ability to foresee death. She received a premonition of the death of her only friend Eun Ji, but stayed silent. Now wracked with guilt, Shi Eun approaches Jang Woo to help him with the clues in her vision. She saw fragmented images related to the murder, but not the face of the killer. The duo begins tracking down a number of other murder cases suspected to have been done by the same person.