Quick recap
Prince Serge Rénine, who is Lupin under another name, meets Hortense Daniel, a young woman stuck in an unhappy marriage, and makes her an offer: eight adventures together in three months, until the eighth stroke of an old clock. Each chapter is a self-contained case across northern France: a death at a château, an old crime by the river, a murder that looks like suicide. Rénine cracks them with sharp eyes and nerve, and Hortense works every case with him. Between cases the two grow closer, and the book ends with the answer to the clock's challenge.
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