Bandits continuously rob a small remote farming village in Mexico. Wanting to put a stop to it, the village leader and two accomplices travel to a Mexican-American border town to hire a few protectors, for the village.
They first hire a lonely cowboy who really has nothing better to do, played by Yul Brynner, who also hires 5 men that are talented in fighting, (with guns and knives). He finally picks up a younger guy who really looks up to Yul and thinks he can be a great asset to the squad. That makes up "The Magnificent Seven".
The seven help make the village stronger by training the men to use guns, sticks, whatever they can find to use against the bandits, and build traps and small walls around the village, to help stop the bandits from invading.
The men have their first fight against the bandits, the ones who escaped gathered more men to return and defeat the seven men. The final battle scene has each of the seven men left by themselves in different areas, (on roofs, behind a fountain etc.), to try and kill the returning bandits. That battle leaves all but 3 of the seven dead. The movie ends with the younger one staying back with the village and the other two heading off into the sunset.