The Key is a graphical adventure which takes place in the late 22nd Century. Earth has just begun exploring the galaxy when you, the pilot of the starship Explorer 7, are contacted by an unknown alien race called the Exiles.

The Exiles claim that they are fighting to preserve Earth from a powerful menace, but that they are losing the war because a fabled Key is missing. You are asked to find the fabled Key, and while you are at it you must discover the truth about the war the Exiles are fighting...