The members of the Starship Enterprise™ must find the people responsible for destroying the planet before an entire civilization dies out.

While exploring an unknown region of space, the U.S.S. Enterprise™ encounters a strange nebular dust. Upon further investigation, they discover a planet called Krantin on which the plant and animal life, as well as the civilization are dying.

A series of explosions and a ship that simply disappears into thin air lead the crew to believe another group is causing the devastation of the planet. The leader of the planet's society, however, is wary of trusting the Starship Enterprise™ crewmembers, and has the away team arrested. With time running out, Data must find a way to save his crewmates or watch as two worlds are destroyed.