Two jetliners collide, and Bill Smith (Kris Kristofferson) is put in charge of investigating the accident. But something isn't adding up about the crash, from the strange comments on the flight recorder to the unidentifiable object found in the wreckage. What Smith doesn't know is that time travelers have taken the ill-fated passengers to repopulate the future. To ensure their mission's success, they send an operative, Louise (Cheryl Ladd), to the past to hamper Smith's investigation.