Façade is like a conversation with one of those crazy internet bots. They will react and say different things depending on what you say.
However, unlike a chat with a bot, this has a plot.
Trip and Grace invite you over for a party to celebrate the day you introduced them to eachother
Trip and Grace are having a few marriage problems.
Depending on how you wish to play you can try to help them resolve their problems, or you can make them worse. Or you can just shout "snake" when Trip let's you into their apartment and have him slam the door in your face.
http://www.interactivestory.net/There are also a few funny videos of people screwing around with this on youtube, just look it up.