A socially isolated student discovers a beautiful, mysterious girl perched high in the trees of a local park. After spying on her with binoculars, the student witnesses her engaging in a private act of pleasure before she reveals hidden wings and vanishes into the sky. Captivated by this otherworldly encounter, the student becomes obsessed with finding the winged creature.
A shut-in young man's life is turned upside down when a stunningly beautiful girl named Floy suddenly appears in his room. As he discovers she is one of the mysterious Nymphs of the Stratosphere, he finds himself captivated by her otherworldly nature and an insatiable curiosity about her origins.
The episode reveals the existence of "defective" nymphs who lack wing ears and the ability to shrink. Floy, a defective nymph, is treated as a mere toy and subjected to sadistic experimentation by a cruel master. As Floy's fragile physical state eventually leads to a tragic end, the narrator is left to mourn her loss and wonder about the mystery of her existence.