RED ALERT! The Lee Valley gold research base is under threat of destruction. The electrical power lever has broken off and there is no other way of switching off the plant’s pneumatic hammers. The hammers were installed to hammer bridge pillars into the river bed. The continuous operation of the hammers is causing the rockface to crack and crumble into the valley floor, threatening the base.

Red O’Blair, famous trouble shooter, is choppered in to save the day. Your job is to help Red cast a new lever, but the only available material is gold, which first has to be found. The gold nuggets have to be pure in quality and exact in quantity to make the required lever.