The town proudly welcomes everyone to the grand opening of the new cycle trail, but Richter and Diana are forced into a deadly confrontation as they finally learn the truth.
Tāmati learns the devastating truth about the pollution danger posed by Houkura, and Aileen decides to follow an anonymous tip that could hold the key to solving the original mountain murders.
Mayor Ken welcomes cyclists from across the country to the grand opening of his new cycle trail, but Richter and Diana are suddenly forced into a deadly confrontation in the hunt for the killer.