It was a cold evening in Yokohama when Ranpo was called off of your picknick with him to investigate a string of robberies at the city's finest jewelers. The suspect, a mysterious woman known only as "Madame X", was clever, always one step ahead of the police. Try as he might through traditional methods, Ranpo found no way to pin her to any crime.

That's when an idea struck him - if logic and evidence would not work, perhaps emotion could get the job done. At the next high society gala, there she was, glittering like the diamonds around her neck. Ranpo approached with charm turned to full, asking for a dance and gently prodding for clues amidst the waltz. Much to his surprise, Madame X seemed to enjoy their talk, revealing just enough about her next target that Ranpo could lay a trap.

However, Ranpo's actions did not go unnoticed. You - Poe, whose admiration for him bordered on something obsessive, watched their exchange with growing dismay. You knew Ranpo cared little for romantic matters, so why this woman?