Su Zheng, the technical director who worked himself to the bone for the company for six years, is fined 100,000 yuan at the banquet celebrating the company's successful IPO. Deeply disappointed, he decides to stop exhausting himself for the company. He starts leaving work on time and keeping email records as evidence. The new person in charge, Zhou Xu, takes over the core system but repeatedly causes major failures. Facing exclusion and attempts to shift the blame onto him, Su Zheng fights back step by step using access records and operation logs. When a major payment system disaster erupts, the boss finally swallows his pride and begs for help. But this time, if they want him to step in, they must first give him all the justice he is owed.