From the introduction:
You’re having an awful dream. That must be it.
Yesterday afternoon while walking through the park a crazy, old white haired guy in a lab-coat jumped out from behind a tree and told you that you were the most important person in history.
When you tried to walk past and ignore him, he said some things; things that he could not have known. Then, while he had you confused, he showed you his car: a silver DeLorean with crazy gizmos attached to it.
By the time you snapped out of your haze, crazy labcoat-guy already had you strapped into the passenger seat and had started the engine. Then, the car took off into the air.
The last thing you remember is one of the car-gizmos shooting something into the air, then an explosion . . .
Now something sharp keeps jabbing you in the small of the back.