Thirteen-year-old bubble boy Will Tuttle lives a boring, friendless life trapped in a Bronxsville mansion, suffering from mysterious allergies doctor can explain. Fed up with his pointless existence he breaks free of the sterile bubble to explore New York City, t expecting to return alive. Instead, Will discovers that his myriad allergies have a single, bizarre source. Suddenly Will is a target. When he's chased through Central Park by a cloaked assailant, a misfit team of bodyguards shows up to keep Will Tuttle alive. . . . And teach him how to blend into a society that isn't supposed to exist.