The majestic Osprey is an endangered bird that hasn’t been seen in Scotland for years, so when Iona McNair locates an Osprey nest, she’s desperate to keep the bird safe from poachers. She shares her secret with her classmate Callum, and the two become friends as they work to save the Osprey they’ve named Isis. They’re able to get the bird tagged by a preservationist, but after Isis flies to Africa for the winter, her signal becomes stagnant, then lost. Spurred by a promise to Iona, who has fallen ill, Callum is determined to track and save Isis, and a leap of faith and the magic of e-mail connects him with a girl in Gambia who can help him make good—in more ways than one.