Forgotten is a 2017 South Korean mystery thriller film written and directed by Jang Hang-jun. The film stars Kang Ha-neul and Kim Mu-yeol, with Moon Sung-keun and Na Young-hee in supporting roles.

Plot

Jin-seok (Kang Ha-neul) moves into a new home with his mother, his father, and his older brother Yoo-seok (Kim Moo-yeol). His father informs him that one room contains the belongings of the previous owner; the brothers are told not to enter the room. That night, when Yoo-seok takes Jin-seok outside in the rain to get some fresh air, he witnesses Yoo-seok being kidnapped and dragged into a car. After 19 days, Yoo-seok finally returns home, but with no memory of his time away from home.