What would you do if you were sitting on a park bench, minding your own business, and one of those annoying pigeons suddenly started to talk to you? And what if the pigeon didn't just talk to you - in a meticulous British accent, no less - but pleaded with you to help untangle a piece of string that had accidentally attached his leg to a wrought iron fence surrounding the playground? And what if, while you are still convinced that this is all a big nasty trick, a hawk swoops down out of the sky and starts cursing at you, also in the King's English, for getting in his way when he wanted to execute the pigeon? That is the quandary in which Jennifer (almost 13 years old and probably a bit too smart for her own good) finds herself one sweltering July morning while babysitting her 11-year-old (very precocious) brother James and his mopey, allergy-prone friend Sleepy. She soon learns that the bird is actually a man named Arthur Whitehair, a 19th-century Englishman who had been turned into an eternally-lived pigeon by misreading an ancient spell that was supposed to give him eternal life as a human. Likewise, an unscrupulous colleague of his, named Malman, had been turned into a hawk by Whitehair's blunder. After years of searching, Whitehair claims (half-truthfully) that Malman has found him hiding in Central Park and is now out for revenge. On top of all this strange business, Jennifer has recently begun having weird dreams in which a crazy-looking man with curly red hair speaks cryptic phrases in Latin. Are they random phrases, or messages? And why would some sketchy guy be sending her messages in her dreams?