A widower starts to realize that his 3 children might be so self-absorbed with their lives that his birthday is overlooked, despite his continuous hope and support he offers them.
A promise made 12 years ago that Kang Seo-ul tries to make sure is kept sends shock waves through Cha Dal-bong's family. In the meantime, Ms. Cha and Mr. Moon's adversity deepens with the help of a misunderstanding.
Kang Seo-ul's presence affects even more relationships in the Cha family. Growing even more suspicious, Tae-ju Moon asks his father for clarifications regarding his connection to Gang-sim, only to be rebuffed.
Following a suggestion made by Tae-ju Moon, Chairman Moon finally approves Cha Gang-sim's transfer as his son's secretary - which brings the two in an even more open confrontation. Seo-ul endears herself more and more to the family.
The hospital Director keeps inviting Gaga-jae out, deeming that he is compatible with his daughter, Kwon Hyo-jin. Gang-sim's auntie tries to set her up, since hearing about her transfer. The identity of the saved boy re-surfaces.
Things start to progress between Hyo-jin and Gaga-jae, and Eun-ho gives Seo-ul a job in his restaurant. Tae-ju and Eun-ho meet under unfortunate circumstances,and later realize how their parents are connected.
Chairman Moon's decision to re-marry troubles both Tae-ju and Eun-ho. The Kwon's pressure on Gaga-jae to accept their daughter causes a big rift within the Cha family. A visitor from Philippines appears.
Hyo-jin's first impression of the Cha family isn't the best. Both Dal-bong and Eun-ho's mother grow resentful of the latter's growing connection to Seo-ul.
Mishaps affect the first official meeting of the Kwon and Cha families. As Tae-ju realizes the reason Gang-sim is working with him, makes a radical decision. Seo-ul also makes a choice regarding her near future.
Seo-ul's grandfather's visit makes a deep mark on Dal-bong. Gang-sim buys an apartment and meets her new tenant. Gaga-jae's wedding is set and Kwon's wife sends a wedding gift to the Cha family with a great impact in their dynamic.
Soon-Bong makes a gift back to his future in-laws. Gang-sim tries to disentangle business issues, helping Tae-ju, but unexpected consequences occur. Seo-ul spends the night in Dal-bong's room and Young-Sul spills the beans to her mother.
Discussion over a prenup causes Hyo-jin a breakdown and unexpectedly visit Gang-jae at his house. Seo-ul begins to remember more about the day she saved the boy.
Dal-bong reveals the truth behind the picture taken 12 years ago. Gang-sim and Tae-ju are trying to re-adjust to working together and discover more and more things that tie them together. Eun-ho rebels against his mother.