Joker: One Operation Joker Vol. 1 offers a bizarre and unexpected twist to the classic Batman-Joker dynamic. In this manga, Batman is de-aged into an infant, and the Joker is forced into an unlikely role — caring for baby Batman! Struggling with parenting, the Clown Prince of Crime tries to navigate diapers, bottles, and tantrums while plotting his next chaotic plan. This volume introduces readers to a surreal mix of comedy and crime, blending the iconic DC villain's madness with humor as he attempts to raise his greatest nemesis.