Prince Mychkine, naïve, gentle, and almost saint-like, returns to Russia after years of medical treatment in Switzerland. His purity collides with the corruption, passion, and ambition of Petersburg society. Through love triangles, moral dilemmas, and tragic misunderstandings, Dostoevsky explores innocence in a world that punishes goodness, raising deep questions about human nature, compassion, and the cost of honesty.