Lieutenant Willis returns home from France, where he was an aviation ace, to find that his father has been falsely jailed for the murder of Judson Blair.

The King of Illyris marries a neighboring princess, who finds out he has a mistress, Sephora. Revolted, she turns to Prince Alexei for friendship. Turmoil increases as a revolution demands the abdication of the King and the Queen opposes this decision.

First one stranger, then another, arrive at the presidio, each with a government pass and each claiming to have been robbed by the notorious Captain Fly-by-Night and his highwaymen. The soldiers and Señorita Anita believe the first to be Fly-by-Night and the second to be Señor Rocha, Anita's fiancée and emissary of the governor. But the first stranger, to whom Anita is drawn, proves to be on a government mission and exposes the second stranger as Captain Fly-by-Night.

Convinced by a vacationing professor that he should get an education, Charles Taylor abandons his cowboy life for college. He finds that higher education involves more than books, however, when the sophomores select him as an ideal subject for hazing.