Top lawyer Pei Yuan disguises himself as a night market stall owner, only to be publicly humiliated and dumped by his ex-girlfriend, Xu Man. Heartbroken, he impulsively marries Bai Chu, a mysterious designated driver, and signs a contract agreeing that they will not interfere in each other's affairs. Both conceal their true identities: Pei Yuan is Mingyuan Legal's star lawyer and major shareholder, while Bai Chu is the newly appointed vice president of Xingguang Group. Together, they use legal and business tactics to take on Xu Man and her new lover, corrupt executive Gao Jian, powerful tycoon Ding Yue, and enemies of the Pei family. As conflicts unfold, their contractual marriage evolves into a genuine partnership intertwined with mutual interests and affection, as they build an ideal life that balances rules with the warmth of everyday living.