A group of students stage a mock bank hold-up to publicize a charity. When the students' leader is shot dead by a bank guard. Homicide detectives have to establish whether the guard was acting within his duty or recklessly; a complication is that jealousy in the group caused the student to be 'set up' for the shooting.
An old couple who run a milk bar in an inner suburb are found brutally murdered. A young man is charged, but some doubts about his guilt still complicate the issue, which brings Det. Sgt. Bronson and Inspector Connolly into conflict.
For three days a cottage in the Dandenong Ranges provides a perfect honeymoon hideaway. But then the young bride is brutally murdered, and Homicide detectives find themselves investigating bigamy as well as murder.
Nancy Tate is kidnapped by two men, taken to a lonely spot and murdered. A search begins for a mysterious eye-witness wearing a cap and a suede jacket.
A clerk is shot when two masked men hold up a factory and steal a £10,000 payroll. Homicide detectives have no leads, and must rely on information from an informer, Sgt. Bronson's 'Aunt Sally'.
Edward Heywood is reported missing, and later his body is found in a river. Two anonymous death threats provide detectives with an important clue. The man's wife had many lovers, and one of them makes a false confession.
A young girl is murdered, and police have a lot of trouble gathering sufficient evidence to bring the killer to justice, aware they must complete their case before he kills again.