Duel - Season 1

Jang Deuk Cheon is a hardened crime squad chief who shows a gentler side at home as a devoted father to his daughter. When she is kidnapped, he throws himself into the search with only one disturbing clue: two men with the same face were seen at the crime scene. As he encounters a human clone, Deuk Cheon is pulled into a shocking case tied to a battle between clones.