Same-sex couple Eun-soo and Ye-won are living together happily. One day, a terrible traffic accident occurs and Eun-soo is seriously injured and her sister Eunhae dies. Eun-soo is disabled and…

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.