Matt falls for Casey, the new girl in school. She’s fun-loving and eccentric, but there’s a darkness to her whimsy that Matt can’t begin to comprehend. When Casey attempts to commit suicide, her parents place her in a mental institution. Matt springs her out, and together the young lovers head on a road trip. They believe their love can “cure” Casey’s problems. Matt starts to wonder, though, if are they inspired or misguided.
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.