Description
El Topo is traveling through a desert on horseback with his naked young son, Hijo. They come across a town whose inhabitants have been slaughtered, and El Topo hunts down and kills the perpetrators and their leader, a fat balding Colonel. El Topo abandons his son to the monks of the settlement's mission and rides off with a woman whom the Colonel had kept as a slave. El Topo names the woman Mara and some days later sexually assaults her. She convinces him to defeat four great gun masters to become the greatest gunman in the land and to earn her love. Each gun master represents a particular religion or philosophy, and El Topo learns from each of them before instigating a duel. El Topo is victorious each time, not through superior skill but through trickery or luck.
After the first duel, a black-clad woman with a male voice finds the couple and guides them to the remaining gun masters. As he kills each master, El Topo has increasing doubts about his mission, but Mara persuades him to continue. After the final gun master outsmarts El Topo by killing himself before El Topo is able to kill him, El Topo becomes ridden with guilt, destroys his own gun and revisits the places where he killed the masters, finding their corpses either on fire, covered with geometrical objects, or swarming with bees. The unnamed woman confronts El Topo and shoots him several times in the manner of stigmata. Mara then rides off with the woman, while El Topo collapses and is carried away by a group of dwarfs and mutants.
El Topo awakens many years later in a cave to find that the tribe of deformed outcasts have taken care of him and come to regard him as a God-like figure while he has been asleep and meditating on the gun masters' "four lessons". The outcasts dwell in a system of caves which have been blocked in — the only exit is out of their reach due to their deformities. When El Topo awakens, he is "born again" and decides to help the outcasts escape. He is able to reach the exit and, together with a dwarf girl who becomes his lover, performs for the depraved cultists of the neighboring town to raise money for dynamite to assist in digging a tunnel on one side of the mountain where the outcasts have effectively been kept imprisoned.
Hijo, now a young monk, arrives in the town to be the new priest, but is disgusted by the perverted form of religion the cultists practice – notably symbolized by the frequent display of a basic line drawing of the Eye of Providence – and their violent preoccupation with guns, from their church "ritual" through to the film's bloody climax. Despite El Topo's great change in appearance, Hijo recognizes him and intends to kill him on the spot, but agrees to wait until he has succeeded in freeing the outcasts. Now wearing his father's black gunfighter clothes, Hijo grows impatient at the time the project is taking, and begins to work alongside El Topo to hasten the moment when he will kill him. At the point when Hijo is ready to give up on finishing the tunnel, El Topo breaks through into the cave. The tunnel has been completed, but Hijo finds that he cannot bring himself to kill his father.
The outcasts come streaming out, but as they enter the town, they are shot down by the cultists. El Topo helplessly witnesses the community being slaughtered and is shot himself. Powering through his wounds, he massacres the town, then takes an oil lamp and immolates himself. His lover gives birth at the same time, and she and his son make a grave for his remains. This becomes a beehive like one of the gun masters' graves.
El Topo's son rides off with his father's lover and child on horseback.
