What's hiding in Harwood Forest? When Pete, Nancy and Krish arrive at Heathland Camp for a school trip, they're in for an adventure – just not the kind they were expecting. Nearby sits the abandoned Harwood Institute. The crumbling buildings are out of bounds but strange screams come from the surrounding forest at night. Mystery shrouds the events that took place at the institute during the war, so Pete and his friends make it their mission to find out the truth. But the forest is hiding a sinister secret, and the trio could be in real danger ... Are some mysteries best left undisturbed?