Irma Vep was a leading agent and strategist of the mysterious gang that called themselves The Vampires. The Vampires were master thieves and assassins, skilled in fighting, infiltration and even hypnotism. They dressed in tight black leotards and ninja-like masks. They used poison, knockout gas and conventional firearms in battle. The Vampires operated in Paris under the command of the Grand Vampire. Irma was hypnotized by Juan Moreno, a rival gangster, into killing the Grand Vampire, but later, it was revealed that there was an even higher authority pulling the strings. After Irma was caputred and sentenced to an Algerian penal colony, Satanas, "Lord of the Vampires" used an electronic cannon to destroy the ship she was travelling on. Irma survived, escaped and returned to Paris. After Sa