At a rainbow trout farming base in the Gobi Desert, Ma Zhenhai has spent ten years building his business. Now, an order worth 6.85 million is finally ready for delivery. But his brother-in-law, Tian Xiaoyong, tries to save on expensive electricity bills by repeatedly violating the fundamental rules of recirculating aquaculture. He secretly modifies equipment, recklessly introduces well water, and illegally sells mature fish. His older sister, Tian Yuxia, repeatedly covers up his mistakes out of family loyalty. Small mistakes snowball into a major disaster. A third-party evidence-recording terminal captures the entire water-quality catastrophe. The buyer rejects the entire shipment, the insurance company refuses to pay, and both the family and the business collapse. Even while facing enormous compensation claims, Tian Xiaoyong still cannot shake his opportunistic nature.