Young Ren, an orphan in nineteenth-century New England, is rescued from the orphanage by Benjamin Nab, who claims to be Ren's brother; but as time goes on Ren begins to question who he can and cannot trust.
In 1687 in Connecticut, Kit Tyler, feeling out of place in the Puritan household of her aunt, befriends an old woman considered a witch by the community and suddenly finds herself standing trial for witchcraft.
Frank and Joe Hardy's latest assignment takes them to the exclusive Willis Firth Academy, where a battle between the students and faculty takes a dangerous turn when someone tries to take out the new headmaster.
Feeling out of sorts with his twin sister, Olive, and their friends Lizzie and Sarah, Peter is drawn to new student Kai, but soon discovers that Kai is not very nice.