The Ranchers have invited a tribe of seriously idle girls into their hotel. As they take advantage, the Ranchers are forced to fight back - but who will be turfed out of their home? Holly is anxious when she realises the journey to the Sparticle Project is coming to its conclusion. She leaves her fellow Questers trapped in an underground nuclear bunker, but there is another force at work. A computer who thinks there has been a nuclear war competes against the ingenuity of the children in a battle of wits.