After the Civil War, a former Union colonel searches for the two traitors whose perfidy led to the loss of a close friend.
A woman wakes up in the middle of the night on board a train, but she can't remember how she got there. Danger and suspense ensue.
Disaster seems imminent when scientists discover that the planet Mongo is about to crash into Earth. Luckily, heroic young Flash Gordon is on hand to lead an investigative mission into outer space and onto the speedily approaching planet. There, he and his best girl, Dale, who is along for the ride, learn that Ming, the devious ruler of Mongo, has purposely put the planet on a collision course with Earth, and only Flash can stop him.
