In this science fiction-themed action adventure, archeologists Michael and Corrine Cavanaugh (Todd Jensen and Jennifer MacDonald) are on a dig in Africa when they discover artifacts that suggest an alien civilization had visited primitive tribes centuries ago. However, this discovery signals Sirius (Frank Zagarino), a ruthless warrior android, who rises to defend the treasures of his world against earthlings who might try to take them -- which comes as especially bad news to the pharmaceutical tycoon who was bankrolling the Cavanaughs, who isnt about to give up their discoveries without a fight. Alien Chaser was also released under the titles Orions Key and Project Shadowchaser 4. ~ Mark Deming, All Movie Guide