Holy Grandpa Jeannot! You don't see him often, but when he visits you, you love listening to his stories, each one more wonderful and crazy than the last, about his adventures. He always promised you that one day, you would leave with him... and well that day has arrived!!! You received a backpack with only one indication: "This trip will be the beginning of your greatest adventure. I challenge you to solve the riddles that I left you. If you and your friends succeed, you will find me again and I am sure that you will not be able to do without traveling afterward.