Forgotten

Jin-seok, a 21-year-old man living with mild schizophrenia, moves into a new house with his family and leads a mostly normal life supported by their care. His older brother, Yu-seok, is a respected college student who serves as a mentor and role model for him. One night, Jin-seok witnesses Yu-seok being kidnapped by unknown attackers, though he cannot identify their faces and only recalls a vehicle identification number that does not match any known car. After 19 days of silence, Yu-seok suddenly returns home but has no memory of what happened during his absence. As time passes, Jin-seok begins to feel that his brother has become a complete stranger to him.