The Gremlins are mythical creatures that attempt to cause damage to the Royal Air Force’s machines in order to cause mechanical troubles. The Gremlins do this in order to seek revenge for the RAF’s destruction of the forest, which is their natural habitat.
The protagonist, Gus, has a Hawker Hurricane aircraft that is destroyed by one of the Gremlins. The Gremlin’s manage to parachute their way to freedom. However, Gus manages to convince them to join the RAF in its fight against Hitler and the Nazi’s.
The RAF then begin an intensive reeducation for the Gremlin’s training. The Gremlins learn how to fix the damage they caused to the RAF equipment and aircrafts. The Gremlin’s become a part of the RAF team and learn to work alongside each other