The player must assume the role of Charlie Chamber, a rich and bored inheritor spending his time with the social obligations of the smart society, as well as with his hobby of being a private detective.

Although he is no professional, Charlie has an advantage: while dreaming he can go back to the places he visited, finding new clues which he had perceived only subliminally while awake.

Dream Chamber is intended as entertainment with an artistic value:[1] the developer has declared[1] that all the artwork has been hand-drawn and the soundtrack, a mix of swing and jazz pieces, is fully original, recorded in a studio.

Despite the opposition of his uncle, the police inspector in charge of the case, Charlie accepts and, unknowingly, embarks (just for ennui) in the greatest adventure of his life.

[2] When the player needs information from a game character, he enters the "battle-questioning" interface: N cannonballs are available (one for each statement by Charlie) to shoot down the "castle" of the opponent, by hitting his weak points.