Captain Kirk and the crew of the Starship Enterprise find themselves in the middle of undeclared war waged by the Klingon empire... the organians should be consulted about the war but their entire planet has disappeared or been destroyed. Mr Spock entered the transporter chamber. His image would be flashed to organia by the huge machines faster than light tachyons. But the experiment failed. Suddenly there were two Mr spock's. One of them had to be destroyed... but which one?