Forgotten (2017)

Jin-seok, a 21 years old man, moves to a new house with his mother, father, and older brother Yoo-seok. Things seem off to Jin-seok in their new home. One rainy night he witnesses Yoo-seok being kidnapped and dragged into a car. After nineteen days of being gone, Yoo Seok suddenly returns home, but he doesn't remember anything from his disappearance. Jin Seok, on the other hand, starts noticing some changes about his older brother