After the tragic death of their parents, the lives of five siblings are irrevocably changed when they are separated. Now grown up, Seo Tae-poong (Lee Byung-hun) is a professional baseball player. Longing to bring his family back together, the kind-hearted Tae-poong has been searching his whole life for his brother and three sisters.
Tae-poong's older sister Seo Chan-joo (Jo Min-su) has been supporting her younger siblings Moon-joo (Kang Sung-yeon), and Ji-suk (Song Seung-heon), who is newly engaged to his girlfriend Jin Soo-ha (Kim Ha-neul). When Tae-poong finds Chan-joo, Ji-suk and Moon-joo, his estranged siblings want nothing to do with him. Reeling from their coldness, Tae-poong must also deal with an eight-year-old boy who claims to be his son. Not knowing what to do, Tae-poong turns to Chan-joo for help. Meanwhile, youngest sister of the family Seo Yoon-joo (Jun Ji-hyun ) has found her big brother Tae-poong after detachment of 10 years but his brother couldn't recognise her. So not revealing her actual identity heartbroken Seo Yoon-joo starts helping her brother. A thug, Ha Shin-yeob ( Cha Tae-hyun ) starts showing his affectionate love towards Yoon-joo by making frequent visit at her workplace.