Archie Dent’s parents are members of a secret society that knows about the giant monsters who want to enslave humanity. He’s always known about the Mangleborn who were buried by past League of Seven members, aided by the Septemberist Society. The League is always seven: a tinker, a law-bringer, a scientist, a trickster, a warrior, a strongman, and a hero. And now that the Mangleborn are attempting to escape again, a new League will form.
But all Archie knows right now is that his parents have been brainwashed by Manglespawn and in order to save them, he needs help. Along the way he meets Hachi, a Seminole girl with impressive skills with a knife; Fergus, a Yankee with an aptitude for machines; and there’s the Tik Tok machine man named Mr. Rivets, owned by Archie’s parents and tasked to keep his young charge safe.
But it’s only by working together that they can stop Edison from waking the Mangleborn buried in the swamps of Florida.