The title character is a US army Captain of Native American descent who is asked to investigate the murder of an Indian agent. His only clue is "April morning", the last words spoken by the victim. Can he unravel the mystery before the clock runs out?

• Benmar Productions
• Scotia International
• Lee Van Cleef
• Carroll Baker
• Stuart Whitman
• Percy Herbert
• Elisa Montés
• Tony Vogel
• Charles Stalmaker
• Charly Bravo