The sea is rough, the wind has picked up, danger hovers above La Rochelle. The giant Kraken, sleeping for centuries, threatens the city, accompany Mermaid Melusine through the city and solve the puzzles that will allow you to save the city. ‍♀️ As a team, explore the streets and the old port looking for clues. The game begins when you start chatting with the chatbot corresponding to your mission. After giving him your access code, he will tell you the details of your mission. You can then go on an adventure and wander the streets looking for clues. Observe your surroundings, solve puzzles and interact with your digital companion (as well as your teammates) to complete your quest. Set off to explore the historic centre of La Rochelle, look for the clues left behind and solve the puzzles that will allow you to save the city!! The necessary equipment : - A charged smartphone with internet access (1/team required – 1/player recommended) - A notebook and a pencil (1/team)