The U.S.S. Enterprise is summoned to transport a dangerous criminal from Starbase prison to a rehabilitation center. The brilliant physicist Dr. Georges Mordreaux has been accused of promising to send people back in time, but then killing them instead. But there's more at stake than just a few lives. Mordreaux's experiments have somehow thrown the entire universe into a deadly time warp. All of existence is closing in on itself, and only Spock can stop the Entropy Effect.