When the Babyz sitter, Gran, finds a "matter exchanger" dropped off by aliens from outer space, she accidentally pushes the button and zaps the Babyz into Super Babyz. The Babyz decide to use their powers for good, but face a challenge bigger than even needing changing. The aliens return to find their matter exchanger, and the Babyz must square off without their new super powers. By overcoming their shortcomings and by working as a team, the Babyz discover they were already more powerful than an extra absorbent diaper.