After being reborn, Wen Yan obtains a system that guarantees her victory in every gamble. To repay her father's debts, she challenges the debt collector Ling Wei to a bet and wins, earning the protection of the legendary gambling king, Old Master Lu. Old Master Lu's grandson, Tianming, is caught cheating people out of money and is taken back home to be disciplined. Ling Wei's boss, Hou Chufeng, seeks control of the casino and forces the Lu family to participate in the World Gambling King Championship. When Old Master Lu is attacked, Wen Yan takes his place in the competition. In the final, she is shocked to discover that her opponent, Hou Chufeng, is actually her younger sister from her previous life, who also possesses a system that guarantees victory in every gamble.