Su Qing, a female technician born in the 1990s, discovered a fatal design flaw in the sky-high-priced imported equipment in a refinery full of male prejudice. She faced the risk of being expelled and insisted on independent reform despite the opposition of the public. During the course of the investigation, she gradually uncovered the shocking shady secrets of profit transfer between equipment suppliers and company executives, and joined forces with veteran craftsmen who were on the verge of being eliminated. By relying on their ancestral skills and modern data, she finally turned the tide, completed a technical counterattack, and achieved personal emotional redemption.