From the Captain's log - some earlier adventures of the Star Ship Enterprise on its mission - to explore strange new worlds, to seek out new life and civilisations, to go boldly where no man has gone before.

Passing the point of no return on his flight to the forbidden planet, the errant Spock surrenders to his pursuers and elects to stand court martial on the charge of mutiny. Can the amazing revelations of the first journey of the Enterprise 13 years earlier excuse his crime, or must the terrors of Talos IV be braved?