Arsène Lupin, the gentleman burglar is in Lille for his new adventure. He covets the fabulous jewel Lydéric created for the city of Lille centuries ago. Prove to Lupin that he can trust you and he will take you on a unique adventure through old Lille. The game starts when you start the discussion with the chatbot corresponding to your mission. After giving him your access code, he will give you the details of your mission. You can then go on an adventure and walk the streets in search of clues. Observe your surroundings, solve puzzles, and interact with your digital companion (as well as your teammates) to complete your quest. The necessary equipment : - A charged smartphone with internet access (1/team mandatory – 1/player recommended) - A notebook and a pencil (1/team)