Penelope Fittes, leader of the well-renowned Fittes Agency wants Lockwood & Co. - and only them - to locate and remove the 'Source' for the legendary Brixton Cannibal. It's a tough assignment.

Made worse by the tensions between Lucy and the other agents - even the skull is treating her like a jilted lover!What will it take to reunite the team? Black marketeers, an informant ghost, a Spirit Cape that transports the wearer, and mysteries involving their closest rivals may just do the trick. But not all is at it seems. And it's not long before a shocking revelation rocks Lockwood & Co. to its very core .