This story is not a crossover with vanilla Minecraft. You may not understand some of the objects in here if you haven't played Tekkit Classic and Mystcraft (A separate mod that I just tossed in because of the possibilities). Just a warning.
The main 6, trapped in the world of Minecraft, have to survive long enough to come home in one piece. They'll have to fight dragons, go through dungeons, and build complicated machinery just to thrive and build what they need to escape.