This was a really interesting game, and I recommend it highly. The idea is that a company that provides time travel to tourists interested in certain historical events - here the French Revolution, the fall of the Berlin Wall, the Beatles in Hamburg, the premiere of a new Shakespeare play, the Boston Tea Party, etc. It's a really great idea because instead of telling you what happened, it tells you what is going to happen, and where you need to go/eat/dress to see it.
The only negative is that some of the trips were just not all that interesting - mostly the extended stays in Marco Polo's China, the trip of the Endeavour around the Globe, and some odd choices like the St. Louis World's Fair, etc.