The movie Codename: Kids Next Door - Operation Z.E.R.O. premiered, bringing the popular animated series' special episode to audiences.
Number 1, Sector V's original operative, defects from the KND and becomes the villain 'Zero'.
Zero experiments and mutates other children to create the Delightful Children From Down The Lane, his mind-controlled army.
The Delightful Children launch a surprise attack on the Kids Next Door treehouse headquarters.
Sector V initiates Operation Z.E.R.O to stop Zero and the Delightful Children From Down The Lane.
Sector V infiltrates the enemy compound to locate and confront Zero.
Number 1 confronts Zero, revealing their past connection and Zero's motives for betrayal.
Zero is defeated by Sector V and is reprogrammed back to a normal kid by his former teammates.