An attempt by some evil Klingons to kidnap visitors at the Las Vegas Hilton is foiled when the twenty-fourth century starship U.S.S. Enterprise NCC-1701-D transports them safely aboard. Taken to the bridge, the guests are told by Commander Riker that the Klingons' plan is to disrupt the future timeline. Riker orders Lieutenant Commander La Forge to take them through the Klingon battle-zone and back to the twentieth century aboard a shuttlecraft so that the timeline can be restored.