A parenting diary of assassin buddies?! Two assassin partners who never let their target get away somehow end up taking in a four-year-old girl. The hot and cool buddies start a family life with this cute, innocent girl. These assassins can handle any job with no problem, and yet, they find themselves struggling with this little girl. From feeding her to playing with her to taking her to and from nursery school, they're always rushing around. But no matter how crazy their life is, when they have a job, they can't turn it down. To further complicate things, the girl happens to be the secret love child of a heinous mafioso that they killed! Is it really possible to live as assassins and parents at the same time? Can this temporary family find happiness?