Captain Jean-Luc Picard (Patrick Stewart), once assimilated by the alien Borg, now senses that they are about to return. He is proved correct when the Collective engage the Enterprise E in battle, only to escape through a temporal vortex into the Earth's past. Picard and his crew glimpse an alternative Earth which is dominated by the Borg and, in an attempt to find out how the Borg have altered the timeline, follow them back to the year 2063, one day before Zefram Cochran made the first warp drive journey. It was this event that attracted the attention of some passing Vulcans and established Earth's 'first contact' with alien life. While Riker (Jonathan Frakes) leads an away team to prevent the Borg from tampering with the Earth's history, Picard must repel a Borg invasion of the Enterprise.