Alien Mission (1989)

Original title: Миссия пришельцев

The story of interplanetary people who gathered for debauchery.

A fantastic story of an ordinary Soviet citizen, not the smartest drinker, whom aliens have chosen as the object for their experiment. They intended to change the brain of an earthling, to improve his intellectual abilities, so that life on our planet became more civilized. But the consequences of the experiment turned out to be so unpredictable that the aliens from outer space even had to turn back the time and cancel their far-reaching plans.