Synopsis：To escape the fate of inheriting his family’s chaebol empire, Kang Do-hyun chooses a quiet life as an ordinary taxi driver. One night, he rescues Cha Eun-seol, who is on the run and has accidentally taken the wrong medication; after an unexpected one-night encounter, they go their separate ways. Four years later, a glamorous CEO appears before him with a child in her arms and suddenly proposes marriage. After they register their marriage, Eun-seol’s parents pressure her to abandon the child, but Do-hyun steps in to protect both mother and daughter. When her company faces a major crisis, Eun-seol attends the family banquet of Taegang Group—the most powerful conglomerate in Country A—to secure a 1-billion-won investment, unaware that the chairman is actually Do-hyun’s father. At the banquet, despite pressure from her ex-fiancé, Gu Jung-tae, Do-hyun’s father shields his granddaughter, Kang Rumi, and reveals himself only as a “grandfather,” unable to disclose his true identity. As time passes, Do-hyun and Eun-seol grow closer. After failing to win the investment, Eun-seol risks her company and her board seat by accepting a dangerous wager from her father, Cha Myung-hwan. At this turning point, Do-hyun seeks out his father, agrees to take up the role of heir, and begins to move in person. In the end, at a press conference, the capital and influence he has quietly prepared reverse the situation, allowing Eun-seol not only to save her company but to secure full ownership, achieving both love and success.