Three young brothers are separated after their parents die in a sudden accident. The oldest, Jang Dong Soo (Lee Beom Soo), grows up to become a police detective like his father. The middle son, Jang Dong Chul (Kim Jae Joong), grows up on the streets and uses his survival skills to climb to the top of the crime syndicate while going by his new name, Heo Young Dal. The youngest brother, Jang Dong Woo (Siwan), was adopted by a wealthy family and uses the name Yoon Yang Ha. Twenty years later, when the paths of the three brothers cross in unexpected ways.