The entire Adult Population of the World has disappeared after a disastrous experiment in a Particle Collider. A tribe of 11 Children discover everyone over 15 has gone to a parallel dimension and so they trek across country to realign the two worlds and bring their Parents back. Written by Stephen Smallwood
For a cbbc show it's actually really interesting and enticing (for season 1 anyway) after season 1 it gets a little more boring with some of the best characters gone