A shy and reluctant Theology high school teacher in Thessaloniki-Greece decides to solve his erection problem by consulting a doctor for the first time after two years. The doctor just replies that the problem can be solved by R20. R20 is played fabulously by Dimitris Starovas. He is a former psychologist (now operating his father's import export meat business) that uses company trucks as moving brothels. R20 actually stands for: "Russian 20 years old" which eventually means that Lakis Lazopoulos has to cheat on his wife to solve his problem.

Based on real events In a school in the northern suburbs, the arrival of the mysterious and charming Chris will upset Dorothea, which will fall in love. Soon the two of them will bring the rest of the gang in a dark new world.