Princess Fedora, who is to marry the Count the following day, arrives and sings of her love for him, unaware that the dissolute Count has betrayed her with another woman. The sound of sleigh-bells is heard, and the Count is brought in mortally wounded. Doctors and a priest are summoned, and the servants are questioned. It is proposed that Count Loris Ipanov, a suspected Nihilist sympathiser, was probably the assassin. De Siriex (a diplomat), and Grech (a police inspector) plan an investigation. Fedora swears on the jewelled Byzantine cross she is wearing that Count Andrejevich's death will be avenged.

Andrea Chenier is a poet during the French Revolution. He and Maddalena are in love. Gerard, former servant in Maddalena's house, denounces them to the Tribunal, but recants it too late. The lovers go to the guillotine together.