TripleMania XXXI: Tijuana was a professional wrestling event produced by Asistencia Asesoría y Administración (AAA). The event took place on July 15, 2023 in Estadio Caliente in Tijuana, Baja California.

Calpuina is a night-watchman in a wharehouse, a perfect job for him. When some thieves break in and steal some crates, El Santo is after them because they are using the wharehouse for diamond smuggling. Capulina hinders their capture. Then he decides that he will put on a wrestler's mask and help El Santo to caputre the crooks.

Santo and Jorge Rivero team-up to stop an international syndicate from stealing Mexico's greatest treasure.

As MATA seeks to upgrade its gadget for all agents, Ali embarks on a mission to stop a plot against Cyberaya but begins to question his loyalty.

James Wallace is a young American. To him Mexico was just another adventure in a life lived without any grand plans. A place to go where nobody knew who you were and nobody cared. A chance to drop out and get by within Mexico's flourishing underground economy. When he finds himself working as a 'surgeon' in Carlos Melgarejos' burgeoning organ trafficking ring things start looking up. But that was before he met Rosalita, a prostitute at the amateur lucha libre whose profound beauty shakes his insouciance. Suddenly there's more to life than cutting out kidneys south of the border. James wants out and he wants to take Rosalita with him. For Carlos this is more than just another headache in a life filled with niggling trespasses, this is personal.

Santo, the saint of the wrestling ring, faces off against an evil voodoo priestess intent on making a more powerful atomic bomb!

Ejen Ali is appointed as the pilot of Project Satria, a new armoured suit with the help of an Artificial Intelligence programme specially designed to optimise the physical performance and mental skills of MATA agents while carrying out their secret missions.

The Blue Demon faces a murderous satanic hypnotist.

Innocent women are being kidnapped and used as guinea pigs for a brain transplant experiment. The diabolical Dr. Frankenstein continues his quest to perfect his brain transplant operation to bring back his deceased wife at any cost - even if it means playing with the lives of others. El Santo and Blue Demon are called in to help when their friend Alicia becomes Dr. Frankenstein's next target. It'll take both heroes to go up against the dastardly doctor and go mano a mano with his super strong zombie Golem.

Cowboy sheriff investigates the murder of a crooked lucha-libre promoter.

After a CIA Agent is seriously injured during a mission, his wife, a former CIA operative, becomes determined to find out what happened - a truth the CIA Director wants concealed at all cost.

The Panther women are worshipers of Satan and perform rituals in their honor and sacrifice. The fighters will face them up and down the ring.