AD 2023, Tokyo. Due to societal shifts such as internationalization and the expansion of trade, the dark side of society continues to evolve. Criminals are becoming more entrenched, and their organizations are growing in size, causing peace and security to deteriorate. The government takes this seriously and decides to introduce an innovative system. To handle special criminals, an extralegal police force is established. It is a special criminal unit, Warriors, composed of a few elite members.