A man with a blood-stained kitchen knife in his hand enters the “Holmes Agency” at lunchtime and holds the knife to the neck of Kyoko, who is out to answer the door. Seiya and Ryosuke, who were with him, are aghast. Momo and Igarashi arrive at the front door shortly after and learn that they are pursuing a man suspected of murder. Momo and the others immediately left, but the man remained holed up in the office. Seiya discovers a stain on the man's chest, which he recognizes as having been made just after he had eaten Italian food. Momo, on the other hand, was convinced that the suspect was inside the office, and immediately dispatched a team of police to surround the area. Momo is so determined that she is willing to use special forces to force her way in if the situation should arise.