An abandoned mansion, strange noises and secret spies ...

Detective duo Alice and Theo reunite with their East End friends to solve a new mystery in Edwardian London. Their curiosity is awakened when sounds come from the spooky house next door. A plea for help catapults the gang into a thrilling chase.

Join them as they dash across historic sites from the British Museum to hidden catacombs in a fast-paced action adventure.