Get set for another incredible adventure with secret agents extraordinaire, Miss Sophie Taylor and Miss Lillian Rose! After the dramatic events of their mission to St Petersburg, Sophie and Lil know the truth – there's a double-agent at work at the Secret Service Bureau. Whilst Lil pursues a dangerous line of enquiry in London, Sophie must set out on a new mission to Venice, following a twisted trail to discover long-buried secrets. But there are villains lurking amongst the city's piazzas, canals and crumbling palaces, and in the shadows an old enemy lies in wait...