All is quiet in the seaside town of Bywater-by-Sea – that is until a meteorite falls to earth, landing in the middle of the Field Craft troop's camp. Now it's not just Tom with strange powers: trouble-maker Jacob can set things on fire and sensible Eric has the power to put them out. What's more, the excavation has uncovered a glittering rock, and the dust is making Bywater-by-Sea even more eccentric than usual.