A peaceful walk in the Dandenong Ranges erupts into violence for vicar Alan Bryant when he assists police who are attempting to make an arrest. Later, Bryant is fatally shot and detectives are faced with a number of suspects and motives, but the true reason for the shooting takes everyone by surprise.
A secretary finds she is pregnant to her former boss, Alan Booth. With her current boyfriend, she blackmails Booth, who is married, for $10,000. Then Booth is stabbed with a paper knife during an argument with his stepson, who says it was an accident. Later Booth is found stabbed to death in a car park, and four people are under suspicion: the secretary and her boyfriend, her father, and Booth's stepson.