Young Lina Verde is searching for a rare orchid on the rugged, steep slopes of Capri. Shortly afterward, fisherman Zeno finds her lifeless body. He claims that he and Lina were a couple, but doesn't even know her address. Did he kill her? Zeno is a notorious liar; he plays the part of a friendly Capri fisherman with female tourists. Rizzi and Cirillo wouldn't put anything past him, but a perfumer leads them to a new clue. Was Lina really just looking for a flower?