Lu Zheng, a CNC genius, was left in a coma after an accident involving a falling object triggered by Shen Yan injured his father. Shen Yan's mother bought his services for five years by paying his father's medical bills. He endured humiliation while secretly mastering core technologies. As the deadline approaches, he founds Zhengxia Heavy Industries with Wen Zhixia, who has been waiting faithfully for him, and plots his counterattack under the hidden identity of Mr. Z. Shen Yan hires a con artist to impersonate his apprentice and aggressively promotes defective machine tools, causing the Shen Group to collapse. Lu Zheng reveals his true identity, uncovers the truth about his father's accident, rescues his father, and marries Wen Zhixia.