An ancient archive transforms the ship into an alien culture's mythology.
The Enterprise encounters a comet with strange ruins, and Data is taken over by a series of personalities from the ancient culture of Masaka. The android begins to speak in strange voices and to turn the ship into an ancient city. The crew has to find a way to understand the language of myths.
The story is an offbeat, mythological story in which Data takes on many roles. It is a showcase for the actor's range, and it has a strong visual style. The mystery of the vanished civilization and its legends is explored through symbols and stories. The episode has a mixed reputation, but it is a memorable and unusual installment.