Basically, you go on this etherpad:
https://etherpad.mozilla.org/SbK29ytX0G
You'll see text highlighted with different colors. Each color is a different person who wrote what happened to their character. You can write stuff at the end or put in things in the middle, just make sure you don't edit people's writing (unless it's a mistake, otherwise people get annoyed :P). Make it as badass as yourself, it's one of the key posts of the RP after all. Hope I helped, I'm on the etherpad right now BTW!