Main •
Ra Mi-ran as Jin Young-soon: a single mother who runs a pig farm, and has lived a tenacious life to protect her child. It is revealed that she indoctrinates and push her son to success to avenge his father's death. • Kang Bo-kyung as teenage Jin Young-soon •
Lee Do-hyun as Choi Kang-ho: Young-soon's son who works as a prosecutor and has a cold-hearted personality. He suffers from amnesia after an unexpected accident and returns as a child. • Bae Jae-hyun as teenage Choi Kang-ho •
Ahn Eun-jin as Lee Mi-joo: a nail artist who is Kang-ho's old friend and ex-girlfriend. • Kim Jun-hee as child Bang Sam-sik
Supporting The Axis of Crimes •
Choi Moo-sung as Song Woo-byeok: CEO of Woobyeok Group and the main antagonist of the series. He is responsible for Kang-ho's father death. •
Jung Woong-in as Oh Tae-soo: a former prosecutor and member of the National Assembly. •
Hong Bi-ra as Oh Ha-yeong: Tae-soo's only daughter and Kang-ho's fiancée. • Park Cheon as Assistant Manager Cha Seung-eon: Woo-byeok's employee.
People in Jowoo-ri •
Kim Won-hae as Son Yong-rak: the head of his village. •
Kang Mal-geum as Jung Gum-ja: Mi-joo's mother. • Jang Won-young as Mr. Bang: Sam-sik's father and mill owner. •
Oh Ha-nee as Seon-yung: Mi-joo's nail art partner. • Kim Seon-bin as Kang-ho's classmate at the Judicial Research and Training Institute. •
Nam Mi-jung as Sun-young's mother. •
Kim Ji-woong as Lee Ji-woong: Ha-yeong's fiancé. • Ki Eun-se as Hwang Soo-hyun: Tae-soo's secretary. • Sung Nak-kyung as Cho Young-jae: the owner of the raw fish restaurant. • Lee Gyu-hoe as Bae Seon-jang: a gambling house boss. • Jo Young-gyu as Woo-byeok's lawyer.
Special appearances •
Cho Jin-woong as Choi Hae-sik, Young-soon's late husband. •
Shin Seung-ho as a civil servant in the livestock division. • Seo Dong-hyun as wedding photographer. •
Ryu Seung-ryong as a tailor. •
Lee Ah-jin as Kang-ho's blind date. ==Reception==