Big-game hunter, Earthman Arthur Harris, has traveled to Mars to hunt down one of the Martian Birdmen. Harris has brought the first dog ever seen on Mars and a Venusian Ptero-Hawk to assist him in the hunt. The "Mars Patrol" official denies his request to hunt the Martians, who he says are sentient beings. Harris tries to pay $10,000 dollars for the 'privilege', but the officer refuses what he calls "blood money", and says he will do everything in his power to stop Harris should he continue in his plans.