Carnapping - Ordered, Stolen and Sold（1980）

When designer Robert Meering returns from vacation, he discovers the company he worked for unexpectedly went bankrupt so he decides to visit his old boss. His former employer Banninger liquidated the company and claims that all designs of Robert are his. When Robert's Porsche gets stolen by two thieves, he manages to track them down. When they tell him about 40 Porsche's in a dealer shop garage owned by Banninger things change and suddenly get very interesting.