It’s training day for William Watermore the Fire Truck and his team. Today, he will meet a new friend, Iris the Fire Fighting Helicopter. After training, William Watermore will be sent to put out a transformer fire. After this, he goes to help his Captain at a farm where a grain barn is on fire. Before he can finish putting out the barn fire, Captain tells William Watermore and Iris to help a runway train who cannot stop. Three of the train's wagons are on fire and a wooden bridge along the tracks is also burning. Will and Iris must use teamwork and courage to help the train escape the fire!