From the back of the adventure book:
"The buzz of musket balls still rings in your ears, a constant reminder that the Cardinal's Guard is never far behind. But it is the heat that will kill you. The air is thick and murky as a marsh, and the sun hot as a smith's forge. A hundred and twenty miles of mud-choked road lie ahead, and already the horse stumbles every third step. The trip from Paris to London is never easy; when it must be done in three sleepless days, with the Cardinal's Guard in close pursuit, it's impossible.
And when the future of Parallel M-1 is at stake, the Time Corps demands the impossible. Your prospects are grim, for the master of intrigue and trickery, Cardinal Richelieu is allied with a Demorean even more clever than he. They will do anything to stop you. Around every corner lurks treachery and suspense: in every inn looms a swashbuckling brawl! With the help of the Three Musketeers, you must reach London in time to redeem the Queen's honor-and prevent King Louis XIII from declaring war on England!"