A terrifying creature emerges from the depths of the Mekong River, wreaking havoc in Bueng Kan and isolating the community from the outside world. As panic ensues, local officials join forces with a group of Chinese scientists who find themselves in Thailand for research. Together, they must race against time to confront the monstrous threat and protect their town before it’s too late. Tension mounts as the stakes rise, leading to an intense showdown between humanity and the unknown lurking beneath the water.