A mysterious object known as 3I Atlas, expected to pass harmlessly through space, suddenly changes course and impacts the Moon—destroying a U.S. satellite in the process. The unexplained event triggers global alarm.

A rapid-response mission is launched to investigate the anomaly before it threatens Earth. When the team reaches the Moon, they uncover a shocking truth: the object is not a comet, but an alien spacecraft hidden beneath the lunar surface.

As the astronauts explore its silent interior, they believe the beings inside are dormant—until one of them awakens.

The film ends with a chilling realization: the aliens have reached Earth.

Aethrimus is a suspenseful sci-fi short about first contact, human curiosity, and the moment we realize we are no longer alone.