Salmokji: Whispering Water is a 2026 South Korean folk horror film directed by Lee Sang-min. Based on the Salmokji Reservoir [ko] in Yesan County, the film stars Kim Hye-yoon, Lee Jong-won, Kim Jun-han, Kim Young-sung, Oh Dong-min, Yoon Jae-chan, and Jang Da-ah. It centers the filming crew, who head to a reservoir to reshoot the scene, encounter something lurking within the dark and deep waters.
The film received positive reviews from both critics and audiences and went on to become the highest-grossing Korean horror film of all time, surpassing the 23-year record previously held by A Tale of Two Sisters (2003).
A road-view filming crew is sent to a remote reservoir to reshoot footage that was previously deemed unusable due to unexplained visual distortions. Led by Su-in, the team documents the surrounding roads and landscape, but during a routine review of the recordings, they seemingly notice unfamiliar figures and unsettling details that none of them recall encountering while filming.
As the crew investigates the origin of the footage, they learn that the reservoir has been linked to a past incident that was never fully resolved. Tensions rise as additional anomalies appear in newly recorded images, blurring the line in between technical malfunction and deliberate concealment, and the crew begins to suspect that the site itself is connected to a hidden crime.
An incident unfolds when a film crew goes to a reservoir to update the road view where an unidentified figure was filmed, and they encounter something in the dark, deep waters.
