The Mystery of the Abandoned House

Twelve-year-old Olivier lives in a remote village where nothing ever happens. But one day he notices a strange incident on a neighbor's property. Sneaking in, the teenager discovers ancient chests with an unusual emblem: two horsemen sitting on one horse...

What is hidden inside? Could the chests belong to the Templars, whose commandery once was located in this area? And how is the suspicious man, who has settled in the house opposite, connected to all this?

Unwittingly, Olivier finds himself at the center of a mysterious story, with the fate of the entire village and possibly even the country at stake!