Set against the backdrop of the Prague Spring period of Czechoslovak history, the novel explores the philosophical concept of Nietzsche's eternal return through the intertwined lives of four characters: a womanizing surgeon, his intellectual wife, his naïve mistress, and her stoic lover. The narrative delves into their personal struggles with lightness and heaviness, freedom and fate, love and betrayal, and the complexities of human relationships, all while offering a profound meditation on the nature of existence and the paradoxes of life.

This novel is a blend of fiction, autobiography, and philosophical musings that explores the nature of forgetting, the power of laughter, and the struggle for personal and political freedom. Set against the backdrop of the political turmoil in Czechoslovakia in the 20th century, it follows the interconnected stories of various characters, including a man who is expelled from the Communist Party, a young woman in love with a man whose father was a political prisoner, and a couple who flee to America. Throughout, the book delves into the ways in which personal and collective memories shape identity and history.