Lee Bum Soo as Lee Kang Mo
Park Jin Hee as Hwang Jung Yeon
Park Sang Min as Lee Sung Mo
Joo Sang Wook as Jo Min Woo
Hwang Jung Eum as Lee Mi Joo
The plot revolves around the lives of the three Lee children: Kang-mo, Sung-mo, and Mi-joo. Their father was killed by Hwang Tae-seob and Jo Pil-yeon, and their mother died in an accident. As a result, the children were separated. Ironically for Kang-mo and Sung-mo, they were both raised by their father’s killers: Kang-mo helped Hwang Tae-seob avoid bankruptcy by advocating the use of a different landfill material, and was later adopted by Tae-seob, and Sung-mo was raised by Jo Pil-yeon, who is a KCIA official. After growing up and knowing the truth, the brothers set off on a quest for revenge. Mi-joo and Jo Pil-yeon’s son, Min-woo, fall in love but cannot be allowed together because their families are enemies. Mi-joo becomes pregnant and goes into hiding while Min-woo desperately searches for her. The whole series revolves around the brothers trying to bring down Jo Pil-yeon, who is also cunning and slippery in his political tactics. Later, Sung-mo is shot in the head by an agent of Jo Pil-yeon. Miraculously, he survived, and had to hide from the KCIA. Jo Pil-yeon tries to work in the government by making false papers. Kang-mo finds out that Sung-mo has knowledge of the contents of the real papers, and finds him. They release the papers, and Jo Pil-yeon fails his objective. He runs away, but is later found and arrested. Sung-mo undergoes surgery to take the bullet out of his head, but tragically dies. Many years later, a now-insane Jo Pil-yeon breaks out of prison to try to murder Kang-mo, but fails, and he commits suicide afterwards. The last scene shows Kang-mo receiving word from his wife Hwang Jung-yeon (Hwang Tae-seob’s daughter) that his long-lost brother (a fourth sibling who was adopted by an American couple many years ago) has come to visit him. Wiki.