Main •
Jung Ji-hoon as Lee Jae-sang, an ace but selfish lawyer from JK Law Firm, one of the nation's top five law firms. •
Lim Ji-yeon as Ra Si-on, Jae-sang's ex-girlfriend who is an impulsive detective and has a tough personality. •
Kwak Si-yang as Goo Dong-tae, a police officer who is Si-on's partner.
Supporting Yulgaek Law Firm •
Han Sang-jin as Kang yoon-gi • Hong Jin-gi as Moon Ji-ho
Sekyung Police Department • Park Shin-ah as Ha Min-hee • Im Sung-jae as Yang Go-woon
Sekyung Prosecution •
Choi Phillip as Min Sung-jin •
Jang So-yeon as Bang Young-suk
Others •
Han Da-sol as In Na-rae •
Seo Ji-hye as Noh Young-mi, Noh Soo-chan's daughter. •
Shin Jae-ha as Yoon Pil-woo, the CEO of Babel Research Center. •
Seo Hye-won as Ring •
Son Byong-ho as Jang Doo-sik • Kim Joong-ki as Park Gi-beom •
Seol Jung-hwan as Jeong Min-soo, an actor. •
Song Yoo-hyun as Yoo Jin-hee ==Release==