In a cul-de-sac in the Faubourg-Saint-Antoine, Leon shares two rooms with his sister Marie. In one, he receives his clients: he is a tailor. In the other, Marie receives her…

A thrilling mystery that unfurls in the alleys and on the rooftops of the French capital, Paris, over the course of one adventurous evening.

Paul is a sweet man-child, raised — and smothered — by his two eccentric aunts in Paris since the death of his parents when he was a toddler. Now thirty-three,…