Exiled to the freezing river overnight after being convicted, with rations lasting only three days, everyone falls into utter desperation. The female protagonist Shen Yu possesses the skill to identify fish and locate water; unfazed by others' doubts, she breaks the ice to fish and seek a way out. She leads the exiled commoners to form a fishing team, sets rules, expands the fishing bay, cleverly produces diverse fish goods to break monopolies, and even helps the border city survive a blizzard and food shortage. Xiao Han, the Prince of Hanzhou, assists all the way. Together, they unite to break free from the predicament, fight for a living path with their own hands, and carve out a prosperous fish workshop belonging to the commoners on the frozen cold river, fully displaying the positive energy of self-reliance in desperation and mutual support.