When the evil Time Lord known as the Nine comes across a rare and valuable item floating in the space-time vortex, his acquisitive nature means he can't resist the urge to complete the set. Soon a wicked scheme is underway. Only the Doctor's friends - past, present and future - will be able to stop him. But without the Doctor around will even the combined skills of Liv, Helen, River Song, Bliss and Charley be enough to save the day?
—Big Finish Productions