With a madman on the loose and Miss Peregrine in peril, peculiar children Jacob Portman and Emma Bloom stage rescue missions, meet new allies, and face great dangers. Jacob discovers a powerful new ability, and soon he's diving through history to rescue his peculiar companions from a heavily guarded fortress. Accompanying Jacob on his journey are Emma Bloom, a girl with fire at her fingertips, and Addison MacHenry, a dog with a nose for sniffing out lost children. They'll travel from modern-day London to the labyrinthine alleys of Devil's Acre, the most wretched slum in all of Victorian England. It's a place where the fate of peculiar children everywhere will be decided once and for all.