Gap Soon is the third daughter of three siblings. She has been in a long-term relationship with a guy preparing for a state exam. As they have known each other since elementary school, their hearts don't exactly flutter at the sight of each other. Neither of them has enough money without having achieved anything substantial, so they cannot even think of getting married. One day, Gap Soon suddenly gets pregnant, so they decide to move in together. However, their life together doesn't go smoothly.

Jang Mi Ri (actress name), a woman driven by her complicated past and greedy ambitions, becomes the focal point of two very different men's passionate pursuit. Jang Myung Hoon (actor name), a meticulously controlled hotelier, and Yutaka (actor name), a warm-hearted Korean-Japanese hotel conglomerate heir, both become entangled in Mi Ri's web of deception. As their love for her intensifies, they are drawn into a dangerous journey that threatens to unravel their lives and relationships. Their shared obsession with Mi Ri ultimately leads them toward a potentially devastating confrontation. This is a South Korean drama exploring the complex dynamics of love, ambition, and personal destruction.

Ji Sung is a NIS agent working at Incheon Airport, and he is known for having sharp observation, judgment, and agility. Ji Sung falls in love with Myung Woo at a hospital he was admitted to for an injury he received during an operation, but they end up breaking up due to their career choices. After three years, he encounters Myung Woo again but becomes attracted to Do Kyung, after locking horns and resolving high-profile cases with her. Do Kyung is a confident businesswoman and the manager of the airport operation headquarters. Although Do Kyung didn't expect romance to bud from the get-go, at a certain point, she finds herself developing feelings for Ji Sung unexpectedly. However, subsequently finding out Myung Woo, who starts working as a doctor at the airport hospital, is Ji Sung's ex, she gets lost between love and friendship.