Casey is a retired Combat Musician, making a living playing small gigs at her local bar. Jake is a professional con man. They need a new couch, which has nothing to do with anything really. Caught up in events they never wanted a part of, Casey and Jake must now save everything they love, working through obstacles strange, frustrating, and occasionally impossible, in an even more impossible city. And if they're really lucky they'll solve the couch problem.

They live in Mur, the first human city. Long since cast adrift in time and space, it is secretly protected by three Forces, believed to be myths: The Cat With No Face, The Grandmother of Keys, and The Silent Heart. Only accessible by seven gates that randomly appear on the other side of any door on Earth, in any time, Mur slides along the path of humanity silently. If you're not careful, or possibly if you're fortunate, you can end up there.