Getting up, going to work, coming home, and going to bed. This was the normal routine for Martin Shimmer. At least...that's what he remembers. But that all changes one day when he suddenly finds himself in the Underworld, with no memory about how he got there.

Now in the company of a kick ass pony named Rosemary, Martin has to change who he thinks he is to survive. But with a faulty memory, that won't be a problem. The only thing he has to remember is this: I'm A Good Pony, I'll be Good whenever I can. That's what I have to Remember.