Olivia McCourtney knows a terrible secret, ghosts are everywhere, and they're furious at the world.
When she leaves her hometown of Savannah, Georgia, to study in New York City, she is confronted by billions of sour spirits. But on the subway train from Queens to NYU, Olivia meets Patrick, a traveler trapped on the Broadway Line.
Olivia is obsessed with helping her newfound friend, but soon realizes that she's the one who needs to be saved when she draws too much attention from both the living and the dead.
Can Olivia and Patrick help each other survive the perils of two different worlds that share a connection?