There is sabotage aboard the Enterprise,
and Spock's investigation leads
him into defiance of the Federation
and a bizarre alliance with the Romulan
and Klingon Empires against
the bloodthirsty Tomarii - a savage race
for whom war and battle are life itself.

Now Spock has been declared a
traitor and condemned to the shame of
the Federation's highest security
prison.  And now Captain James Kirk
must face the toughest decision of
his command, while a lifelong friendship
and the destiny of the free universe
hang in the balance!