The Aztec reign is one of cruel and ruthless oppression, fuelled by regular human sacrifice. In the jungle-infested city of London, one man defies them: the masked vigilante known as the Conquistador.

Then the Conquistador is recruited to spearhead an uprising, and discovers the terrible truth about the Aztecs and their gods. The clock is ticking. Apocalypse looms, unless the Conquistador can help assassinate the mysterious, immortal Aztec emperor, the Great Speaker. But his mission is complicated by Mal Vaughn, a police detective who is on his trail, determined to bring him to justice.