Jiang Cheng unexpectedly acquires the ability to appraise treasures. At an antique stall, amidst fifteen fake silver dollars, he discovers a signature-edition Yuan Shikai silver dollar worth 4.5 million yuan hidden away. Not wanting to alert the sly stall owner Lao Zhao, he intentionally haggles and spars with him. Unexpectedly, Lao Zhao calls in a fake wealthy client to rig the game and drive up the price, intending to treat Jiang Cheng like a fat sheep. Jiang Cheng plays along, luring the fake wealthy client into bidding four million before suddenly pulling out, driving the two into a dead end, and ultimately buying the entire stall of silver dollars for a mere 5,000 yuan. When experts confirm the genuine treasure and transfer 4.5 million yuan on the spot, Lao Zhao is filled with bitter regret, and an elaborately crafted scam completely turns into a joke.