

Koiti Mikage, the world's wealthiest man, had spent years concealing his identity while working as a cashier to raise his son, Kazuma. Unexpectedly, Kazuma ended up marrying Yuki Hanyo. The Hanyo family was domineering and overbearing, so Kazuma tried to keep the wedding from Koichi, yet Koichi showed up uninvited. At the wedding, Kazuma was belittled at every turn, prompting Koiti to step in and defend Kazuma. Despite initial mockery, Koiti just responded by presenting extravagant gifts. But when faced with persistent provocations, Koiti no longer held back. At that moment, his powerful and influential goddaughter burst in, declaring her desire to marry into the Mikage family, which sent shockwaves through the crowd.

Kang Do-hyun chooses an ordinary life as a taxi driver to avoid inheriting his father’s family business. One day, he happens to rescue Cha Eun-seol, who is fleeing a chase and has accidentally taken the wrong medication. After a one-night encounter, they part ways and return to their separate lives. Four years later, a stylish CEO shows up with a child and proposes marriage to Do-hyun. After registering their marriage, Eun-seol faces pressure from her parents to abandon the child, but Do-hyun appears and protects both mother and daughter. As her company falls into crisis, Eun-seol attends a family banquet of Taegang Group—the most powerful conglomerate in Country A—to secure a 10-billion-won investment, unaware that the chairman is actually her husband’s father. At the banquet, despite pressure from her former fiancé Gu Jung-tae, Do-hyun’s father protects his granddaughter Kang Rumi and makes his presence known, yet he can only approach her as a “grandfather” without revealing his true identity. As time passes, Do-hyun and Eun-seol grow closer. However, after failing to secure investment, Eun-seol risks both her company and her board position by making a dangerous bet with her father, Cha Myung-hwan. At this critical moment, Do-hyun seeks out his father, accepts the responsibility of becoming the heir, and begins to take action himself. In the end, at a press conference, the capital and influence Do-hyun has prepared turn the situation around. Eun-seol not only saves her company but also secures full ownership, achieving both love and success.