"When twelve-year-old Reuben finds a peculiar, magical watch that has the power to turn its wearer invisible, he's propelled on the adventure of a lifetime"-- When Reuben discovers an antique watch that was mortared into the wall, he soon learns it has a secret power. As one secret leads to another, Reuben finds himself torn between his innately honest nature and the lure to be a hero. Now he is on a dangerous adventure, and with fearless Penny, mighty Jack, and the wise Mrs. Genevieve on his side, Reuben must outwit and outmaneuver the sly villain called The Smoke and his devious defenders the Directions, in order to save the city from a terrible fate.