La vengeance du serpent à plumes

On arrival in Paris, Paco, an international terrorist, is arrested, while his mistress Laura joins his accomplices. They all belong to terrorist and anarchist splinter group, Ravachol-Kropotkin, led by Paco. Meanwhile, Louie (Loulou) Dupin learns that his grandmother is dead and he is the sole heir of her Paris apartment. He also goes to Paris.