Qin Tian, the Heavenly King of Nanyang who shook the region, grew tired of disputes and retired to be a security guard, repaying a favor by accompanying Lin Man for three years. Yet he was brutally framed and imprisoned by Lin Man's sister, turning cold and pulling away after escaping death. Shen Nian, the legitimate daughter of the Shen family, approached him, and the two made a contract to pretend to be a couple, joining forces to fight the family villain Shen Ze and wash away the wrongful grievances. Qin Tian protected Shen Nian multiple times to defuse crises, and the two gradually developed genuine feelings from mutual utilization. As the investigation deepened, the conspiracies of former sworn brother Gao Yuanying and underground force Kun Shan were exposed one by one. Having gone through business games and heavy perils, Qin Tian joined hands with Shen Nian to smash all conspiracies and settle all grudges.