The autopsy of a deceased girl finds that the victim had died long before the accident. Taking over the case, "Grandpa" and his assistant, Panaitescu, discover that the perpetrator of the false accident is being blackmailed.

A gang falsifies college degrees and sells them. They also help their careers, so that later they can blackmail them to obtain industrial espionage.

The main characters are two "Don Juans", professional "fiancees", who travel the country in search of desperate women willing to spend money to find their soulmates.