Every year, on the same Friday in November, a single pressed flower arrives — no note, no sender, no explanation. For thirty years, the ritual has remained unbroken, baffling detectives, eluding forensic tests, and haunting the aging man who receives them. Now, only three people are tied to the mystery: the recipient, a retired detective obsessed with his one unsolved case, and the unknown sender who has kept the secret alive for decades. When the latest flower arrives, buried memories resurface and long-forgotten truths begin to take shape. But solving the mystery may come at a cost none of them are prepared to pay. A Friday in November is a haunting tale of memory, obsession, and the quiet patterns that shape our lives.