William Thatcher, a peasant, is sent to apprentice with a Knight named Hector as a young boy. Urged by his father to “change his Stars”, he assumes Sir Hector’s place in a tournament when Hector dies in the middle of it. He wins. With the other apprentices, he trains and assumes the title of Sir Ulrich von Lichtenstein.

Upon receiving reports of missing persons at Fort Spencer, a remote Army outpost on the Western frontier, Capt. John Boyd investigates. After arriving at his new post, Boyd and his regiment aid a wounded frontiersman who recounts a horrifying tale of a wagon train murdered by its supposed guide — a vicious U.S. Army colonel gone rogue. Fearing the worst, the regiment heads out into the wilderness to verify the gruesome claims