First Son, Yoo Hyun Ki (Lee Sung Jae), is a widower and single dad with a daughter. He hasn’t opened up his heart in a long time, but then Sung In Ok (Myung Se Bin) a single mom, enters his life, and he falls in love. Second Son, Yoo Min Ki (Ryu Soo Young) is a martial arts fantasy novelist who has been in love with the same woman, Lee Shin Young (Han Hye Rin) for ten years. Only she’s now engaged to his best friend. Third Son, Yoo Seung Ki (Seo In Guk), is the biggest troublemaker of them all. He marries his wife, Mi Rim (Yoon Se In) but divorces her because he’s a playboy. They married because he got her pregnant and has no choice in the matter.