Rewind

I’m writing this from a jail cell in an alternate dimension, awaiting execution by an advanced race of humans from another universe. I know it sounds absurd, but not nearly as farfetched as the sequence of events that led me here. I suppose I deserve my fate.
Time travel’s messy, and there can be severe consequences for the universe you’re traveling in if you screw things up. That’s the gist of why I’m here.

My name is Jack and I’m a thirty-four year old high school history teacher from another Earth that hasn’t yet discovered time travel on its own.
My universe was ruined by a time tourist and it became my job to undo the damage he did. Nothing went according to plan. We were fools to think we could change things.