Jack Buckles arrives in London hoping to find his missing father, only to discover he's inherited a family legacy as a 'tracker' in a secret society. He's recruited into the Ministry of Trackers, which operates from the mysterious Lost Property Office deep under the city's subway system. Using his unique ability to see the past of lost objects, Jack must solve a dangerous puzzle involving a legendary fire and a hidden treasure to save his dad before time runs out. This fast-paced adventure blends mystery, history, and a touch of magic in the shadowy corners of London.