The film adapts and expands the Planetarian visual novel by Key. The story is set in a dystopian future where biological and nuclear warfare has left a once prosperous civilization in complete ruin. The film tells the story of an old man travelling around with a mobile planetarium projector to show people the stars.

Planetarian: Hoshi no Hito is continuing, but new episodes have not been scheduled yet. Track it to get notified the moment they are.