After six months recovering from a nervous breakdown in a flight, the salesman Bob Wilson is released from the psychiatric clinic. His wife Julia Wilson travels home with Bob by plane following his doctor's advice. Bob is nervous but under control. Out of the blue, he sees a monster on the wing and calls Julia, the stewardess and the flight engineer, but nobody sees the Gremlin. When Bob sees that the monster is destroying the controls in the wing, he takes an ultimate decision.
—Claudio Carvalho, Rio de Janeiro, Brazil