Lin Mo, a programmer, is fired after offending his superior while standing up for someone. He enters the stock market with 200,000 yuan but loses nearly everything, leaving him with just 30,000 yuan. By a stroke of luck, he meets Su Wan, the owner of a coffee shop in Huaqiangbei and a top professional stock trader. After becoming her apprentice, he establishes an ironclad stop-loss rule and learns everything from reviewing past trades and selecting stocks to market sentiment cycles and identifying true market leaders. Having endured enforced periods of staying out of the market and battles against his own inner demons, he finally makes his move at the market's lowest point, successfully rides a weak stock's reversal into strength, and becomes a prominent professional trader.