Guinevere St. Clair is going to be a lawyer. She knows everything there is to know about the brain. She was the fastest girl in New York City. And she wants to ride into her first day at her new school on a cow named Willowdale Princess Deon Dawn. Gwyn is definitely not the kind of girl you forget. But that's just what her mother has done. In fact, Gwyn's mother, Vienna, hasn't been able to remember anything after the age of thirteen since Gwyn was four. Gwyn's father is obsessed with solving the mystery of Vienna's brain, but almost as soon as they arrive in Crow, Iowa, Gwyn's hot on the trail of a different case - one she thinks can actually be solved. Farmer Wilbur Truesdale is missing, and there's only one person who could possibly know what happened to him: her brand new next-door archenemy, Gaysie Cutter. The more Gwyn goes looking for answers, though, the more questions she encounters - about Wilbur, about Gaysie, but also about the mother she's never gotten the chance to know. Gwyn's determined to hunt down the truth about everything, but what if the truth isn't as simple as pointing the blame at someone? What if sometimes the most terrible things that happen aren't actually anyone's fault at all?