Slim, the son of an astronomer, becomes involved in an extraordinary situation when an industrialist’s son, Red, discovers two mysterious creatures on their estate. Meanwhile, the astronomer informs the industrialist about contact with aliens who seek help to save their regressing civilization. When they find a crashed spaceship with deceased aliens, they realise the creatures Red found are actually surviving aliens. The industrialist agrees to aid them, and the aliens repair their ship to return home. This story subtly critiques the 20th-century enthusiasm for nuclear energy, highlighting the consequences of its irresponsible usage, which ultimately poses an existential threat to humankind.