Uncario

"A Moon colonist's sterile life is upended by vivid dreams and a mysterious signal from a long-abandoned Earth."

In a future where the last humans have taken refuge in a cold, sterile Moon colony, A-153 is being driven mad by vivid dreams of a beautiful green world. While planning his escape, he picks up a distress signal from Earth. Hellbent on making contact, soon he will discover the horrifying truth about his fantasy world and the person who called for help.