Phlengrak is the cherished son of the Phleng Phin Isan Lamsing mor lam troupe. Fate leads him to fall for Janphen, the daughter of the likay troupe Phet Jaras Fah's owner. He's faced with a serious obstacle, however, because Janphen's father Thuaithep loathes mor lam due to his painful history with mor lam singer Kesorn. As a result, he's completely forbidden everyone in the likay troupe from getting involved with mor lam artists.
When a mysterious monster rises from the Mekong River and attacks Bueng Kan, it cuts people off from the outside world. Officials and people in the area, including Chinese scientists who accidentally came to conduct research in Thailand, all forces must be mobilized to catch this crazy monster before it's too late.