Bo Young moves into the mansion of the previously wealthy grandmother, Wang, as a caregiver with a dangerous intention. Mother Kim, the only blood relative of Wang who hired Bo Young, sets conditions such as 'Do not bring anyone, especially children,' and 'Do not go near the reservoir'. Ominous and bizarre signs continue in grandmother Wang's huge mansion located next to a reservoir called 'Gwimot', where people are dying, and Bo Young finds out that foreigners who have visited the place have suffered a mysterious death...
Unfortunately the movie Devil in the Lake is not yet available on HBO Max.
| Editing | Kim Byeong-rok | Editor |
| Sound | Choi In-hee | Original Music Composer |
| Crew | Kim Byung-oh | Martial Arts Choreographer |
| Camera | Han Ju-yeol | Director of Photography |
| Lighting | Park Chan-yun | Lighting Director |
| Sound | Lee Ju-suk | Sound Supervisor |
| Production | Lee Jeong-mi | Executive Producer |
| Production | Moon Bo-hyun | Producer |
| Production | Oh Hyung-il | Producer |
| Production | Choi Tae-young | Executive Producer |
| Directing | Tak Se-woong | Director |
| Writing | Tak Se-woong | Writer |
