Seoul, South Korea, 1997. When the young but extremely anxious student Jin-seok, his parents and his successful older brother Yoo-seok move to a new home, mysterious and frightening events begin to happen around them, unexplained events that threaten to ruin their seemingly happy lives. Unable to understand what is happening, Jin-seok wonders if he is losing his mind.
Unfortunately the movie Forgotten is not yet available on HBO Max.
| Sound | Yoon Jong-min | Production Sound Mixer |
| Camera | Park Ri-woong | Data Wrangler |
| Crew | Yoon Dae-won | Martial Arts Choreographer |
| Visual Effects | Kim Nam-sik | VFX Supervisor |
| Visual Effects | Ha Seung-nam | Special Effects Supervisor |
| Writing | Lim Sun-ae | Storyboard |
| Directing | Jang Hang-jun | Director |
| Camera | Kim Il-yeon | Director of Photography |
| Production | Park Jun-sik | Producer |
| Editing | Heo Sun-mi | Editor |
| Production | Jang Won-seok | Executive Producer |
| Camera | So Jeong-o | Camera Operator |
| Costume & Make-Up | Kim Jung-won | Costume Design |
| Costume & Make-Up | Song Jong-hee | Makeup & Hair |
| Editing | Cho Han-wool | Editor |
| Writing | Jang Hang-jun | Screenplay |
| Art | Kim Hyung-jik | Set Decoration |
| Lighting | Kim Min-jae | Lighting Director |
| Editing | Ryu Yeon | Digital Intermediate Producer |
| Costume & Make-Up | Sin Eun-yeong | Makeup Artist |
| Art | Choi Im | Production Design |
| Sound | Gong Tae-won | Sound Supervisor |
| Sound | Kim Tae-hoon | Original Music Composer |
