Every night, in a little stable just outside of town, an old mare lays down to sleep. And every night she has the same dream of rainbows and open sky...

Humans.

Truth or myth? Ancient lost civilization or just an old pony's tale?

No pony has ever seen one, and most haven't even heard of them. But Lyra knows that these wonderful creatures are more than just old legends, and she's going to find out... and possibly drive her roommate insane in the process.