Courage and loyalty win out over brute power as Coriko and Pippa save themselves and other enslaved children from the oppression of the wearers of the Mask. Forced to mine the sands of Grassland under the glare of dark-masked Spears, all the Diggers want is to escape - but even saying that word can bring a beating ... or worse. Yet six friends secretly vow to run away from slavery and find the freedom that was stolen from them long ago.