Newly arrived in New England, 1892, and in need of a job, Abigail meets R. F. Jackaby, an investigator of the unexplained with a keen eye for the extraordinary. Abigail has a gift for noticing ordinary but important details, which makes her perfect for Jackaby's assistant. Abigail finds herself on a thrilling case: A serial killer is on the loose. The police believe it's an ordinary villain, but Jackaby is certain it is the work of a creature whose existence the police seem adamant to deny.
