Two strangers have dropped their kids off at a pickup area for a children's camp in Helsinki, Finland. A spark of mutual interest is ignited between the man and woman.
At work, she's a renowned assassin. At home, she's a single mom to a teenage daughter. Killing? That's easy. It's parenting that's the hard part.
Jae-ho, who aims to become the number one in a crime organization, gets to build up trust with Hyun-su, an ambitious newbie in the prison. While they try to take over the organization after the prison release, their ulterior motives starts to emerge.
