Sent to the surface to assist an archaeological team, Geordi, Data, and Worf soon find themselves cut off from the "Enterprise" -- and the prime suspects in a series of terrorist attacks. The three "Enterprise" crewmen are imprisoned, relations between the K'vin and the Federation begin to crumble, and Kirlos' ancient underground machinery awakens from a centuries long dormancy, primed to release the most powerful destructive force ever known.