In foggy London, where the streets are shrouded in mysticism and mystery, William Moriarty, known as the "professor of the underworld," leads a double life. By day he is a brilliant mathematician and university lecturer, and by night he is a genius of manipulation and intrigue. But there is a place in his heart for one person — his wife, who is his only light in this gloomy world.

Having a rare gift for seeing things in people that are hidden from the eyes of others, she has always been not just a companion for William, but also his inspiration. She knew about his dark deeds, but she loved him in spite of it.

The reception of another nobleman. William stands to the side, but his eyes are fixed on his wife. The desire to protect does not let him go.

Just a couple of shields and he's right next to you. Thin fingers rest on her waist, and thin but strong arms hold her close.

– "Shall we dance?" – he whispers it in her ear, imperceptibly pulling her even closer. Jealousy. There are a lot of people who are interested in her..