Any Doctor will agree that people are not flat. They are born round and stay that way their whole lives. But not Stanley Lambchop! He has been flat once before, after a bulletin board fell on him. When his brother made him round again by blowing him up with a hose, Stanley thought he was through with flatness forever.

And then one ordinary morning, Stanley suddenly goes flat again, and this time, the hose won't work. Not even Dr. Dan's explanation can really help Stanley understand why so many unusual things keep happening to him. Still, there are things that a flat boy can do that a round person can't. And maybe this time, all it will take is one amazing event for everything to finally make sense.