Stardate: 50132.5 Voyager is unexpectedly attacked by a ship from the future. The 29th century Federation “Timeship” has been sent to destroy Voyager and its crew, as they are told their ship will be responsible for a temporal explosion that will destroy Earth’s solar system in the 29th century.

Voyager disables the timeship as it is attacked, but is then sucked into a temporal vortex created by the timeship, which brings them to 1996 Earth.

The crew must find a way back to their own time, find out how they may have caused the temporal explosion in the future, while at the same time not affecting the events of the past they are currently stuck in.