When the world-destroying alien army The Shock invaded the home planet of young brother-sister duo Zadam and Triply, the youngsters' parents scuttled them off to the relative safety of the Lost Nebula. The kids landed on a living Planetoid and discovered three other homeless youths: Ryle, blue-skinned and a fierce competitor; Lavana, a fairy-winged mage; and Duncan, a musclebound tinkerer. The group banded together to fight The Shock as the Brats of the Lost Nebula.