Harry Houdini - the world's greatest escape artist - is in need of a new hat. That is what brings him to Bennett & Son, Gentlemen's Hatters of Fifth Avenue, where young Nathaniel G. Makeworthy Fuller is working for the summer. A surprising friendship develops between the world-famous daredevil and the boy clerk, and it comes in the nick of time. A suspicious stranger has recently wheedled his way into the confidences of Nate's wealthy great-aunt, with whom the boy and his widowed mother live. Now their house is filled with spooky late-night gatherings, the purpose of which is kept secret...