So here is the story.
The American Revolutionary War is going badly. Ben Franklin, reasoning about the effect that a division of rifles would have had on Spartacus's revolt, travels in his time machine to our present to see if he can bring super-weapons back to win the Revolutionary War.
After landing the the present, looking like a homeless guy with strange clothes, an accent, and no identity, he is shuffled into the bureaucracy. Eventually he escapes.
Then he decides . . .
I think the ending is obvious.