Lee Seo Jung has recently joined a fashion magazine company called Style. Her boss, Editor Park, is loathed by her employees because of her bad temper. As Seo Jung is trying to climb the ranks of this company, she realizes that the fashion world is not a pretty place. Romance, backstabbing, competition, and lies all come along with the territory. However, she meets Seo Woo Jin who helps her during this tough time. Little does she know but Woo Jin is actually her boss's ex-boyfriend. How will this affect Seo Jung's pursuit of working in the fashion world?

Lee Se-na is the only daughter from a wealthy background. Because of her pampered upbringing, she believes that she can get anything she wants if she sets her heart to it. She meets Han Seung-Woo, a self-made diplomat, who is not-so-secretly in love with his childhood friend Yoon-su, currently in Japan with her fiance, Seung-Woo's colleague Jin-Hui. Se-na instantly falls in love with Seung-Woo, who asks her what she thinks the meaning of marriage is. In their subsequent marriage, their values are questioned as Se-na's complete trust in Seung-Woo shatters with the realization of Yoon-su's and Seung-Woo's relationship, and Seung-Woo's happiness in marriage shatters with Se-na's deepening mistrust and her own relationship with Jin-Hui.

Young-jun, president of Young-Eum Music, fights the conspiracy of Sungchoon, president of rival company, Victory Records. But he ultimately dies while fighting. Sungchoon and his people cover up Young-jun's death as an accident. Young-jun's wife, Myungja, gives birth to their son, Sung-jae but due to Young-jun's sudden death, she falls into grief. Sungchoon has also been raising his children, Min-chul and Min-ji, alone after his wife's death. He proposes to Myungja and she accepts.In the meantime, at an orphanage, Yeon-soo and Sae-na, two orphans as close as sisters, are preparing for a birthday party for just the two of them. Coincidentally, the president of Victory Records, Sungchoon and his son, Sung-jae, happen to visit the orphanage.Time passes and … Yeon-soo works hard at making a living by teaching art and working at a restaurant. On the Christmas when Yeon-soo and Sae-na promised to meet, Yeon-soo is involved in an unexpected car accident and is unable to keep her promise. From then, they walk separate paths without learning of each other's whereabouts.