The story of a detective who is involved in a shocking incident due to encountering a clone and the clones who have to fight each other for survival is told. The powerful actors Jung Jae-young, Kim Jung-eun and rookie actor Yang Se-jong have confirmed their roles. Jung Jae-young plays the role of a seasoned detective Jang Deok-cheon who makes the wrong choice to protect something precious, Kim Jung-eun plays the role of Choi Jo-hye, a prosecutor who is ambitious for success, and Yang Se-jong plays the role of the suspect "Sung Joon" who has lost his memory and the clone "Sung Hoon" who has falsely accused Sung Joon, making the audience look forward to this pursuit thriller theme.