Does situational crime prevention actually work, or is crime simply displaced to a neighbouring area? This film tells the story of an experiment in situational crime prevention by the Cambridge Institute of Criminology conducted in a medium sized UK city.  The streets of an experimental area were relit with more powerful lighting. The researchers then monitored changes in crime and fear of crime in the experimental area, a neighbouring area and a control area in a different part of the city. The film provides students with a powerful example to illustrate the strengths and limitations of situational crime prevention.