Su Nian, who is working hard to make a living in Jiangcheng, unexpectedly encounters Lu Shiyan, the richest man in the city. To get rid of the persistent attention of Wen Ruoxi, a wealthy heiress, Lu Shiyan asks Su Nian to pretend to be his girlfriend. He offers her 500,000 yuan for a one-month dating contract and takes her back to the Lu family. Facing the deliberate tests of Lu Shiyan's mother, the two work together seamlessly to maintain their act and pass the test. Wen Ruoxi grows jealous and repeatedly frames Su Nian with malicious schemes. In the end, Su Nian and Lu Shiyan join forces to overcome every obstacle and resolve all their crises.