"Lockwood & Co. are hired to investigate Edmund Bickerstaff, a Victorian doctor who reportedly tried to communicate with the dead, while Lucy is distracted by urgent whispers coming from the skull in a ghost jar"--

In the beautiful Cartier makeup compact she bought at a flea market, Phoebe finds a letter written during World War II in London, from one sister to another, which contains a "spell" for bringing people closer together, a kind of treasure hunt around London--and Phoebe could really use such a spell, because her older sister, Alice, will be leaving for university soon, and just now she seems to be cutting Phoebe out of her life.

Geronimo travels to London on a secret mission to investigate rumors that someone is trying to steal the crown jewels, but before he can solve the mystery, he must help Trap perform a trick in a magic show.