There could be several stories in the form of contracts. Example, the Mun Community goal is to build some infrastructures on Mun and will suggest things to do by offering contracts to the player with that in mind. Another agency could focus on building a communication network. Another one to build up a Space station somewhere, etc. The stories can be simple, just a few contracts, or full fledge one's. You're not forced to choose them since they are only contracts. Several mods could easily add new stories, and if the player is curious he will complete them just to see where it will lead to.
