London, England, 1860. When Clara's Grandfather Drosselmeyer brings on an apprentice with a mechanical leg, all pretense of normalcy takes wing. Theodore Kingsley, a vagabond haunted by the war, wants a fresh start. He meets clockmaker Drosselmeyer, who hires him as an apprentice. When Drosselmeyer disappears in his secret flying owl machine, he leaves behind a note for Clara to join him on a merry scavenger hunt across Europe. Together, Clara and Theodore set off to follow Drosselmeyer's trail of clues, but they will have to stay one step ahead of a villain who wants the flying machine for himself - at any cost.