Three drunken youths force a young girl, Lynda Wilson, into their car at knifepoint and trigger off an explosive situation that involves Det. Curtis personally. Her father, Charles Wilson, talks her out of telling the police about the assault in order to save the embarrassment of appearing in court. He does not realise his information is vital to the police, who believe the same youths are also responsible for bashing Const. Young. Library books found at the scene of the attack provide a vital clue in tracking down the yobbos.