
Monstrum
2018 · Movie · 106 min · ★ 6.5 · 89% critics
In ancient Korea, a new ruler takes power amid violence and growing unrest. As plots spread and the kingdom slips into chaos, alarming rumors reach the royal palace about a mysterious creature feared by ordinary people.
Also known as Water Monster
Where to watch
Streaming on AMC+, Philo and Shudder — or rent from $2.99.
2 hours to watch.
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Details
- Original title
- 물괴
- Years
- 2018
- Release date
- 2018-09-12
- Language
- Korean
- Runtime
- 106 min
- Critic score
- 89/100
- TMDB rating
- 6.5/10 (203 votes)
- Box office
- $5,500,000
About
You’ll likely enjoy this if you want a historical thriller with political turmoil and a looming creature threat; Not for you if you prefer grounded dramas without monsters or scares, like in Rampant.
Pros: tense historical setting; creature-driven mystery | Cons: limited review info; unclear character depth
Themes
- giant monster
- based on true story
- palace intrigue
- 16th century
- joseon dynasty (1392–1910)
Cast & crew

Kim Myung-min
as Yun-gyeom

Kim In-kwon
as Seong-han / Mulgoe (voice)

Lee Hye-ri
as Myeong-i

Choi Woo-shik
as Royal Court Officer Heo

Lee Kyung-young
as Sim-un

Park Hee-soon
as King Jung-jong

Park Sung-woong
as Jin-yong

Lee Do-gyeong
as Grandpa Song

Lee Kyu-bok
as Mo-gae

Kim Joong-hee
as Mak-gae
Directed by Huh Jong-ho