For the umpteenth time, bright tongues of flame tear up the night over Paris like blades. Rich houses are burning, heads of famous families are dying, and newspapers are trumpeting with might and main about the mysterious and ruthless Parisian arsonist. Only Viscount de Moreau, an aristocrat who is engaged in investigations not at the behest of his profession, but by vocation, can stop the criminal. Together with him, a lady is drawn into the maelstrom of monstrous events, and it is no wonder that a special relationship soon arises between her and the Viscount. Danger is approaching, and this time it is not only about honor, but also about life. Literary adaptation by O. Koltsova.