Nicholas Duck proudly puts on his Santa's helper suit and begins collecting wish lists from children, but when Nicholas's brothers and sisters decide to help, things get a little out of control.
In the nineteenth century, ten-year-old Florence Crutchfield leaves a London orphanage to live with her great-uncle, great-aunt, and sickly cousin James, but she soon realizes the home has another resident, who means to do her and James harm.
The Livingstone kids are fruit bat hybrids who have left Old World dangers and immortality behind for a "normal" life in New York City, but normal doesn't necessarily mean easy, especially with lingering vampire traits complicating things.
A reading circle mishap convinces Jake that he never wants to speak during class again and Abigale loses her trust in one of her best friends, but they both have to deal with their fiendish cousins from New York.
As Christmas approaches, Caroline Malloy continues the feud between her sisters and the Hatford brothers by making Wally Hatford be her partner for a special project at school.
Moose Flanagan, who lives on Alcatraz along with his family and the families of the other prison guards, is frightened when he discovers that noted gangster Al Capone, a prisoner there, wants a favor in return for the help that he secretly gave Moose.