A marriage agreement is forged to preserve a family legacy. Ju Jihoon is the eldest son of the founder and CEO of Ju Financial Group (JFG), the third-largest banking services holding company in South Korea. JFG oversees eight subsidiaries, including Lee Bank, which is owned by Seyoung's parents. Lee Seyoung is the only daughter and the adopted child of Jihoon's second-degree relatives. Their families have arranged this union primarily to strengthen the company's stability and secure Seyoung's future.