The female lead and male lead saved each other as children and exchanged tokens of love, promising to marry when they grew up. Although they did marry as arranged by their families, they remained unaware of each other's true identities. Meanwhile, another childhood friend of the male lead, who knew about their promise, schemed to replace the female lead. She constantly sowed discord between the couple. In the end, with the help of an ally, the male lead uncovered the scheme, and he and the female lead found happiness together.