An evildoer condemned access to a secret underground passage. Access to the latter is now hidden in the city. It is up to YOU to thwart this evil spell by regaining its access. Head to the heart of the historic city centre to start this magical outdoor quest. But beware, the platform will close forever in 2 hours. Visit each of the families indicated on your smartphone to try to gather in the time allotted 4 code words to find the location of the platform. They will also allow you to gather key clues to connect to find THE code word that will validate your meeting with each family. On the program, solving puzzles or meeting with a noble family and its servants, access will disappear in 120 minutes. Tick tick tick.