Kaftes diakopes (Lust for Revenge) (1976)

A group of adult friends get involved in a “game” inspired by a successful writer just for the fun of it but also for creating the plot story for his new book. They kidnap the little daughter of a happy couple who are on summer holiday. The girl’s father borrows the enormous amount of ransom demanded and pays the kidnappers but it turns out that the money is counterfeited, a fact which complicates things further and leads to a string of vengeance murders that no one could foresee in the first place. Another sleezy Greek gem.