Prince Lev Nikolayevich Myshkin, a fair-haired young man in his mid-twenties and a descendant of one of the oldest Russian lines of nobility, arrives in Saint Petersburg on a November morning. He has spent the past four years in a Swiss clinic for treatment of his epilepsy and supposed intellectual deficiencies. On the train journey to Russia, Myshkin meets Parfyon Semyonovich Rogozhin, and is struck by his passionate intensity, particularly in relation to a beautiful woman with whom he is obsessed. Myshkin's only relation in St. Petersburg is the very distant Lizaveta Prokofyevna Yepanchina. Madame Yepanchina is the wife of General Yepanchin, a wealthy and respected man in his late fifties. The prince makes the acquaintance of the Yepanchins, who have three daughters-Alexandra, Adelaida, and Aglaya, the last being the youngest and the most beautiful. General Yepanchin has an ambitious and vain assistant named Gavril Ardalionovich Ivolgin (nicknamed Ganya) whom Myshkin also meets during his visit to the household. Ganya, though actually in love with Aglaya, is trying to marry Nastassya Filippovna Barashkov, an extraordinarily beautiful femme fatale who was once the mistress of the aristocrat Totsky. Totsky has promised Ganya 75,000 rubles if he marries the "fallen" Nastassya Filippovna instead. As Myshkin seems to be innocent and na�ve, Ganya openly discusses the subject of the proposed marriage in front of him. It turns out that Nastassya Filippovna is the same woman pursued obsessively by Rogozhin, and Ganya asks the Prince whether Rogozhin would marry her. The Prince replies that he might well marry her and then murder her a week later. The prince rents a room in the Ivolgin apartment, also occupied by Ganya; Ganya's sister Varvara Ardalyonovna (Varya); his mother, Nina Alexandrovna; his teenage brother, Nikolai (Kolya); his father, General Ivolgin; and another lodger named Ferdyshchenko. Nastassya Filippovna arrives and insults Ganya's family, which has refused to accept her as a possible wife for Ganya. Myshkin restrains her from continuing. The insult is compounded by the arrival of Rogozhin accompanied by a rowdy crowd of drunks and rogues. On the strength of his newly inherited fortune, Rogozhin promises to bring 100,000 rubles to Nastassya Filippovna's birthday party that evening, at which she is to announce whom she shall marry. Among the guests at the party are Totsky, General Yepanchin, Ganya, Ferdyshchenko, Ptitsyn-a usurer friend of Ganya's who is a suitor to Varya Ivolgin-and others. With the acquiescence of Kolya, Prince Myshkin arrives, uninvited. Following Myshkin's advice, Nastassya Filippovna refuses Ganya's proposal. Rogozhin arrives with the promised 100,000 rubles, but Myshkin himself offers to marry Nastassya Filippovna instead, announcing that he has recently received a large inheritance. Though surprised and deeply touched by Myshkin's love, Nastassya Filippovna, after throwing the 100,000 rubles in the fire and telling Ganya they are his if he wants to get them out, chooses to leave with Rogozhin. Myshkin follows them.
