Description from the publisher:

Dreams is a game of perception and intuition with 72 large cards illustrated by eight different artists.

In each round, four pictures are revealed. The players are gods who transfer one of these images onto the night sky as a new constellation of stars. Which one is transferred is determined in such a way that all players but one know the picture in question. The one who doesn't know which picture was chosen tries to remain undetected during the round.

Star by star, the players now transfer the picture onto the night sky (i.e., the central mat) until all stars are placed. There is a good chance that different players will emphasize different aspects of the picture in question. After the placement phase, the "Gods" try to detect the "ignorant" player, while the ignorant player tries to name the picture that was chosen. The right balance between keeping the imposter in the dark and not giving the regular players cause for suspicion has to be struck...