An alien from a distant galaxy, carrying out an astro-throw scientific experiment, ends up on Earth and, of course, falls in love with a beautiful earthly girl. In appearance he is no different from earthlings, but it is not so easy for him to settle down on Earth. His compatriots live according to the strict laws of logic and expediency, brushing aside emotions as a harmful relic and an obstacle to rational and useful activity. And suddenly love, a passion that captured him from the very first hours of his earthly life. How to be? Honor and conscience do not allow him to seduce the girl whom he will soon have to leave forever. But she also loves him passionately... Such is the dilemma. How will our lovers solve it?