Twins, Tom and Lucy, now fully-fledged WILD agents are off on another adventure, and this time Dr Fisher is sending them into the rain forests of Sumatra in search of a group of orphaned baby orangutans in grave danger. Forest fires, which seem to have been started deliberately, are sweeping through their habitat.With no adult orangutans to help them, it's up to Tom and Lucy, but can they get there in time...and track down the arsonists?