Sixteen-year-old Rose Nolan arrives on Ellis Island in 1911 in the hopes of starting a new life, but after most of her family is sent back to Ireland, she must find her own way in a new country and fend for herself and her younger sister.
Twelve-year-old Gregor returns to the world beneath New York City, where he joins forces with Princess Lexa and Ripred the rat to defend the Underlanders and the Nibblers from the army led by the adolescent rat king, the Bane.
Seventeen-year-old Gwen, who has been living with her grandfather in Manhattan while she attends music school, joins up with another music student to solve the mystery when her grandfather suddenly goes missing.
Sabrina and Daphne Grimm return to New York City to investigate the death of an important Everafter, and discover a secret that might lead them to the Scarlet Hand.