When three brothers were very young, they lost their parents. The three brothers were then separated and lived apart for 20 years without knowing of each other. They then meet again unexpectedly and begin their relationship as brothers. Jang Dong-Soo (Lee Beom-Soo) is the oldest brother. He works as a detective. Jang Dong-Woo (Siwan) is the youngest brother. He was adopted by a rich family when he was a baby and became Yoon Yang-Ha. He is cynical and cold.
as Heo Young-dal / Jang Dong-chul
as Yoon Yang-ha / Jang Dong-woo
as Jang Dong-soo
as Hwang Shin-hye
as Oh Jung-hee
as Sung Yoo-jin
as Ko Bok-tae
as Kim Ok-kyung
as Min Su
as Man-kang
as Oh Jung-hee's grandmother
as Kang Jin
as Kang Hyun-mi
as Jang Dong-soo (young)
as Hwang Shin-hye (young)
as Yoon Tae-jun
as Wan Bae
