A nation divided
A Queen's life at risk 
A net of conspiracy closing in... 
Sometimes being a time traveling adventurer just isn't easy...

For a start there's a temperamental TARDIS that lands a few thousand years off course in 17th Century Paris. But why shouldn't the Doctor, Peri and their traveling guest Erimem take a look around the city on the morning of King Louis' annual State Ball? 

As Peri becomes embroiled in a plot to kill Queen Anne and smash the unity of the Church and the Crown, the Doctor finds himself dueling Musketeers on the streets. 

With Peri missing, Erimem catching King Louis' eye and a Musketeer's sword at your throat, could things get any worse?