When 9-year-old Lucie arrives at Bectoile for the holidays, she has no idea of the adventures that lie ahead. Her mother, Caroline, is leading an archaeological dig in the area with her colleague Pierrot. Bectoile is also the town where Caroline grew up, and where a family secret is concealed... which Lucie is about to unveil! With the help of her new friend Yann and a very special pair of songbirds, Lucie is determined to delve into her family story. From the basement of a ruined castle to a camper van parked on the edge of the woods, this adventure will lead them from unusual surprises to fabulous discoveries!