In different parts of London three recruits prepare for their first day at the Metropolitan Polices training centre at Hendon. All three had succeeded in getting into the police in spite of weaknesses. But on their first day the assistant commissioner announces that he wants them to join a team of undercover detectives. Their brief? To become criminals; to work their way up through whatever criminal organisations they can get access to & to collate evidence against the criminals they come across. Their target? One of the worlds biggest drug dealers Den Donovan alias Tango One
- number one on HM Customs & Excises List of most wanted criminals. Three years later all the recruits are getting close to their target. Too close perhaps to remember the rules.. .