Thirteen-year-old Rory discovers a spirit world that thrives alongside his contemporary New York City, filled with fantastical creatures and people from the city's colorful past who have become gods and goddesses and who have chosen Rory to perform a dangerous mission.

Thirteen-year-old Rory continues his mission to free the spirits of the Munsee Indians from their Central Park prison without starting a war among the residents of Mannahatta, a spirit realm that co-exists alongside modern-day New York City, filled with fantastical creatures and people from the city's colorful past.