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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.

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 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 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 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.

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.