Harold doesn't know that a fire is simmering when he rushes into the forest. He's chasing a squirrel that's wearing roller blades, and the squirrel is moving fast. Surprised by the spreading wildfire, desperate to save small animals and their homes, Harold gets help from the squirrel, a crow and neighborhood pets. But it takes fire fighters reaching the blaze, and a scolding from his parents, to teach Harold the right ways to respond to a forest...