Mrs. Shem is a murderer

Author's name: Kang Ji-young

After losing everything she owned as a result of her husband's suicide, Mrs. Sheem finds herself alone with the responsibility of supporting two children: a son who is about to return to university after completing his military service and a daughter who is preparing for her high school exams.

Her search for work leads her to a mysterious place called "Smile" Agency for Services, but she soon discovers that behind this innocent name hides a dark world of hired killers.

Driven by necessity, Ms. Shim begins her new job, spending her days cooking and preparing kimchi, and transforming at night into a professional assassin dealing with criminals. Over time, her fear transforms into courage, and her survival depends on her ability to balance her roles as a mother and as a killer. But when her profession intersects with her personal life, and she finds herself threatened with losing her family, Ms. Shim is forced to make a life-altering decision: will she protect those she loves, or continue down her path in a world where there is no room for weakness?