In Perpignan, the killer explodes a bomb in the city center. The nightclub targeted belongs to Milo Ubieta. He is the father of a runaway teenager, Lena. The apartment in which he had locked her shattered and she managed to flee to find a certain "Lancelot". Hélène Siquelande tries to find a link between that and the killing at the sawmill because she does not believe in coincidences.
