Hired Gun opens with the sound of horses hooves galloping towards 'Maverick Saloon'. A stranger in town bursts through the swinging doors and demands a drink. This is Luke Horn, a freelancing cowboy who hires out his gunskills to the highest bidder. He has been hired by Morgan Fetterman to clear squatters off Fetterman's land. Fetterman has laid claim to Flatbush ranch - a high, fertile valley out West. However, Horn soon sees through Fetterman's bogus claims to ownership and vows to help beautiful and stubborn Jemima Penrose, who is determined not to give up land. What ensues is a game of cat and mouse with both party trying to outwit - and outshoot - the other.