Two months have passed since the events of
Burning Sky, and things have changed for Nathan Richards. Incensed by Kukulkan’s victory and the unexpected loss of his mother, he refuses to
play The Game of Lost Souls again until he knows what the stakes areuntil he meets a girl named Mavis in the field museum. They hit it off immediately, becoming good friends with the
possibility of being more. The only problem is that she died mysteriously at the Chicago Columbian Exposition, more than 100 years ago.
In order to reveal the mystery of his new friend, Nathan must play the Game once more and traverse the frequencies. With the help of Alyssa and his friends, he will have to immerse himself
in the Chicago Expo and the deep rivalry between Thomas Edison and Nikola Tesla to learn Mavis’s forgotten secret. This time, though, Nathan might have an advantage. Ah Puch, the Mayan god
of the underworld, has offered Nathan his assistance against Kukulkan . . . no strings attached.