Bounty hunter Chateau runs into an assassin named Ryang-ha Song while on a job. After their meeting, he ends up giving her information on other bounties. One day, a different job comes in and Ryang-ha ends up being the target.

Chateau wakes up in a motel after being helped out of a pinch by Ryang-ha. She passes on to him the warning that Hou had given for the "traitor." What was his crime five years ago?

Chateau is being held hostage in a car filled with explosives, and so Ryang-ha confronts Hou. This is Chateau and Ryang-ha's most dangerous situation yet.

Despite knowing that her boss is beginning to suspect that she might be in contact with Ryang-ha, Chateau goes on to carry out a hit that he had tipped her off to.

Chateau goes to church on the anniversary of her father's death. She runs into Ryang-ha, who is his usual self, before they are met by an attacker. Meanwhile, Chateau's boss is meeting with her mother to try to understand her past.

Chateau boards a luxury cruise ship for a mission. There, she runs into Ryang-ha, who makes things difficult for her once again. They spend a night in a room together, in part so that Chateau can keep an eye on him.

Chateau tries to determine Euripedes' whereabouts, but is bothered by Ryang-ha's suspicious behavior. He lets a mysterious attacker escape, and when he meets with Chateau, she pulls out a gun.

Chateau leaves herself with Jinon and his associate, Nikka, in order to carry out her operation. Meanwhile, both the boss and Jim are put in danger.

Ryang-Ha confronts Donny, who had brought him here with some unresolved business. Meanwhile, Chateau makes a commitment to finding Ryang-Ha.

With some help, Ryang-Ha and Chateau hide out in a tent under a bridge. Chateau is concerned about Ryang-Ha's wounds. They pretend to be married in order to hide their identities.

17 years ago. Ryang-Ha was assisting Donny, when he takes in a boy who was being chased. A job Donny gives him leads him to another fateful encounter.

Two "Ryang-Has" survive desperately with a young Chateau. But Ryang-Ha is cornered by his enemies, and the other Ryang-Ha, too, is severely injured.