An Ultra Squad patrol craft mysteriously crashes into a commercial plane in mid-air. The Ultra Garrison investigates the incident. Meanwhile, Furuhashi's mother visits him in an attempt to coerce him to quit the force. At that time, Furuhashi is airborne in the Ultra Hawk 3. A beam emanating from a lighthouse has somehow caused the Ultra Hawk aircraft to malfunction, forcing it on a collision course with another airliner. The lighthouse is actually an alien base doubling as a UFO. Ultraseven and Windom (one of his monster helpers), attempt to destroy the Kanan base before Furuhashi collides with the other plane potentially killing 300 people.
