In this sequel to Powerless, the superpowered kids of Noble's Green are once again threatened by an unknown force that may be trying to steal their powers.

Eleven-year-old orphan Tommy Learner's world in 1900 New York City collides with that of twelve-year-old, modern-day Jezebel Lemon in the basement of her apartment building, where together they must use the portals between worlds to thwart the Dead Gentleman, a legendary villain whose last unconquered world is the planet Earth.