Algorithm engineer Jiang Chen saves his boss's daughter by donating blood, only to suffer hemorrhagic shock and receive a mere 300 yuan as a dismissal payment. His superior steals the credit for his project, publicly humiliates him, and forces him to resign. Relying on his technical expertise and secretly preserved evidence, he joins forces with his good friend Chen Feng to expose his rival's fraud on the spot during a municipal project bidding process. He wins the contract and takes over a new company. To cover up his crimes, boss Liu Guoqiang steals the money that was meant to save his daughter's life. He eventually goes to prison for using toxic building materials and evading taxes. His wife, Zhang Yue, loses all hope in him, hands over the incriminating evidence, and divorces him.