Markus gets attacked by a likely environmental activist and hires the former police officer Erik Bäckström in the hope of tracing the perpetrator. The police cadet Peter, who is Erik's nephew, is also involved in the investigation.
The body if Johannes Fresk is found, and the police regard it as a hit and run. However, Peter has other suspicions. Erik realizes that it can be a murder and tries to find the evidence before it's too late.
