In the smallest of small places - smaller than your thumb, smaller than a pinhead, lies an amazing world. Tinch and her friends are the amazingly tiny recycling heroes saving the world from ourselves. But all is not well when the stream dries up and they uncover a devious plot to steal all the water: the one source of energy we all rely on! To save themselves, and the world, Tinch and her trusted companions must prepare for a showdown with their mechanical enemies – the dreaded Zeloids.