B-movie film noir take on Crime and Punishment. A college student gets deeper and deeper in trouble when he takes a loan from a shady college professor.

A black envelope presents the hero, detective Harry Peel, who loses his fortune over the course of the story, with tasks. A mysterious criminal, car and motorcycle chases through the wintry Alps, and the blowing up of a bridge provide cinematic spectacle and opportunities for daredevil stunts.