Prologue: I Don't Know Who You Are, But I Will Find You And I Will...

They say a lovable and caring parent make a child happy. Diavolo obviously is not that type of person.
Yet, he stuck with a sassy little girl in his house.
Thus, begin a chaotic story of bizarre child-parent bonding.

An alternate universe modern story where Trish is a first-grade student, Diavolo is a mafia leader and Doppio is her babysitter.