A poor student in Prague is desperate for money and makes a deal with a mysterious man who offers him wealth and success. As the student's life improves, he starts to notice strange occurrences, including a lack of reflection in mirrors and encounters with his own evil double. As he delves deeper into the deal he made, he realizes the true horror of his situation.

Notorious jewel thief Roger "Tiger" Brown sneaks into the trust of diamond dealer Thomas Morland. Not only does Morland's jewels appeal to him, but also his fiancée, Lady Edith Trent. But when Morland acquires the largest diamond in the world in Amsterdam, Brown decides against Edith and for the diamond, takes it and runs away.

Based on a Victor Blüthgen's novel, the story tells the tragedy of Gendarm Mö­bius and his only daughter Stina. Having an affair with Lohmann, Stina gets preg­nant. She secretly goes to the city to have her baby. But it is born dead. She comes back home. [The film starts from here.] She finds that her lover Lohmann got en­gaged and the wedding will be celebrated the next evening. Getting mad, Stina sets fire to Lohmann's house in his wedding night. She is caught by her own father Gendarm Möbius: on account of the fam­ily honor, they choose their own death.