A recently released convict decides to betray his two partners to the BAD Organization over one billion yen in loot. Can Robot Detective K stop Bad Organization's mysterious "Murder Salesman" before he finishes his mission?
Kuroda tries to abscond with the billion yen, leaving Bad Organization in the lurch. BAD is not fooled, however, and sends its "Debt Collector". Detective K must face this new robotic threat, while trying to prove himself a capable cop to Detective Shiba.