A heartwarming drinking-water presentation in a rural village hides a trap. Many elderly villagers are persuaded by false claims and spend their savings on water purification equipment. Lin Qiushui notices something suspicious and, despite pressure from various sides, gathers clues and investigates the potential dangers. The other party tries every means to obstruct her and destroy evidence to conceal the truth. Eventually, the relevant authorities step in to investigate, the entire scam is exposed, and the affected villagers recover their losses. A reminder to look out for the elderly in our families, stay vigilant, and carefully assess sales campaigns that come to rural communities.