Step into Megalopolis, a city that was once tranquil but now teeters on the edge of chaos. Criminality thrives here, fueled by the shadowy arms dealer, Agent Abrella, and her sinister network of Alienizers. Hope rests with Ban Akaza and the elite Dekaranger Special Police – their mission: to defend Earth from this alien threat and restore a long-lost sense of peace and justice to the planet.