A gang of teenagers are mugging women on the streets of London. When they are caught and forced to join a youth club, they use it as a base for their growing operation.Amongst the bomb-sites and dark alleys of postwar London, Roy Walsh (James Kenney) and his gang of juvenile delinquents waylay and rob old ladies. Without parental control from his war-widowed doting mother, Walsh, already on probation, drifts into more and more devious and serious offences.