To combat computerised crime more effectively, the Cyber Police unit of the future Japanese city of Oedo has restarted the feudal practice of hōmen (放免), employing hardened criminals with a history of hi-tech offences and other crimes such as murder as officers themselves. Three such criminals are Sengoku, Gogol and Benten who are serving their 300-or-more year sentences in an orbital penitentiary. For duty served, each criminal will receive a reduction in their prison time. Desperate to get away from the boredom and monotony of jail life, they half-heartedly agree to the deal. They answer to police chief Hasegawa who keeps them in check thanks to an explosive collar that each criminal wears around his neck. Hasegawa can blow this collar from a distance and it will also explode if they fail to complete their missions within an allocated time period. Check out the review.