The school children, led by Miss. Magpie, are taken on a nature trip for an excursion. That night, while Miss. Magpie sleeps, Blinky, Nutsy, Marcia, Shifty, Splodge and Flap sneak out to do some exploring, when they come across an abandoned goldmine. However, once inside they become trapped. But that is not their only worry, because lurking inside the mine is an evil goanna who does not want them to escape. Will they manage to get past the goanna and his traps? Is there another way out of the mine? Will they be able to get back to Miss. Magpie? And will they get back home?