In June 1993, the body of an 18-year-old TAFE student is discovered in a rain-soaked ditch. Investigators are baffled as the victim count increases.

In Australia, investigators struggle to identify a male torso washed up under a wharf. DNA testing techniques is required to crack the mystery.

When a family of four is found dead and the killer's attempt to incinerate the evidence fails, investigators follow a trail of clues and ballistic evidence to catch the culprit.

An early morning routine walk along the beach in 1995 uncovers a human skull, but investigators are stuck when no dental record exists.

Officers investigate the brutal murder of a mother and her two children, found stuffed in suitcases and dumped in the bushland.

Investigators examines handwritten notes left by a murderer. They dissect the entomology of the insects found on the victims.