Who is this Rosalie Blum? This question has been on Vincent's mind, the shy hairdresser and model builder, for days. He begins to follow the mysterious stranger unnoticed on her paths through the city and even to her house. Meanwhile, he does not realize that he himself is under constant observation. The young French author Camille Jourdy impresses in her charmingly and cleverly constructed book, especially through her quirky characters, whose lives are thrown into disarray by the events set in motion by Vincent. Her harmonious watercolor illustrations add a buoyant lightness to the whole.