The Enterprise is summoned to transport a dangerous criminal from a starbase prison to a rehabilitation center: brilliant physicist Dr. Georges Mordreaux, accused of promising to send people back in time - then killing them instead. But when Mordreaux escapes, bursts onto the bridge and kills Captain Kirk, Spock must journey back in time to avert disaster - before it occurs. Now there's more at stake than just Kirk's life. Mordreaux's experiments have thrown the entire universe into a deadly time warp. Spock is fighting time...and the universe is closing in on itself with the relentless squeeze of… The Entropy Effect.

Sinopse em inglês, como veio da fonte.

The Enterprise is summoned to transport a dangerous criminal from a starbase prison to a rehabilitation center: brilliant physicist Dr. Georges Mordreaux, accused of promising to send people back in time - then killing them instead. But when Mordreaux escapes, bursts onto the bridge and kills Captain Kirk, Spock must journey back in time to avert disaster - before it occurs. Now there's more at stake than just Kirk's life. Mordreaux's experiments have thrown the entire universe into a deadly time warp. Spock is fighting time...and the universe is closing in on itself with the relentless squeeze of… The Entropy Effect.

Sinopse em inglês, como veio da fonte.