 The Aki, a research vessel on a long voyage, is returning home to Earth with its crew complement of seven. All seven members are woken from deep sleep mid-voyage to the confusion of all, but the reasons why they were roused become clear as Laura Lewis witnesses her shipmate being brutally massacred by an unknown and invisible creature. Cut off from her shipmates and unarmed, Laura must face this creature before it takes out the crew one at a time.