Billionaire Shen Wanshan and his wife, Su Qing, pretend to be a residential security guard and a cleaning lady to raise their son, Shen Xiaoyang, independently through 24 years of modest living. Unexpectedly, on their son's wedding day, his fiancée, Lin Jiaojiao, joins forces with the rich second-generation heir Ouyang Lei to humiliate him. Forced to reveal their true identities, the elderly couple takes down the arrogant villains while helping their son win back his true love, the wealthy and beautiful Xia Wanxing.