Jiang Yanci, the young master of the Jiang family, was murdered by his close relatives in a joint conspiracy on a stormy night and pushed into the river. Fortunately, he was rescued by Shen Wei, a fishing village girl. To hide from assassins, he pretended to be insane and foolish, ate dead fish, drank muddy water, and endured every humiliation. When the fishing village was suddenly struck by the black-gill fish plague, the villagers intended to drown him in the river to sacrifice to the water god. Shen Wei risked her life to protect him and married him. After regaining consciousness, Jiang Yanci devised a strategy to save the fish, returned to the city with the jade pendant and witnesses to expose the truth, ultimately overturned the case to reclaim the family business, and returned to Shen Wei's side. The two joined hands to guard the water town, became a devoted couple in the end, and guarded each other in happiness for a lifetime.