The fear of being replaced often makes people do irrational things. Luna is the best human cow in the world, her milk sold and appreciated in every country. But... there are rumors about her replacement. The girl is devastated by the news and decides to do something so fantastic that no one will have the courage to send her away from the factory: in a single night she will produce the milk output of an entire year. She will only have to wait for the night when she will be completely alone and no one will be able to object. What a wonderful surprise her Master will have tomorrow morning! Liters and liters of milk will surely make him proud of his human cow. Perhaps he will impregnate her again... after all, when she is pregnant with her master, her milk is so sweet! Overwhelmed by her love for her Master, Luna begins to increase the power of the machinery more and more, which at one point sets off a sinister alarm. What is going on? She can't unhook the tubes from her udders, the milk... is flowing backwards into her body! Gradually her udders swell, meanwhile night falls and there is no one to hear the poor cow's moans! No one can help her! The milk continues to fill not only her udders, but her belly swells as well, it becomes a real milk balloon! Having reached the limit of her endurance, Luna's udders explode, leaving a grotesque spectacle for whoever arrives first at the factory the next day: her exploded body gallons and gallons of milk... completely gone!