A man with a knife smeared in blood came into the Holmes Agency office. He grabbed Kyōko and held his knife close to her neck. With the kuitan and Ryōsuke unsure of what to do, Momo and Igarashi dropped by and notify that they were running after a suspect who killed an Italian chef. While the detectives left the office, the man stayed. The kuitan noticed that the man had just had Italian food by the stain found on his clothing.
Meanwhile, Momo, who were convinced that the suspect was hiding in the office, issued an order to surround the office. While the inside of the Agency remains tense with the stand off, a new report on TV tells that the man killed the owner chef of the Italian restaurant “Veeno.” The man started to recount what really happened in the restaurant.
The suspect, who had just come out of prison today, visited the restaurant he would often go and ordered Spaghetti alla Bolognese. After finishing the dish that did not have the same taste as before, the man found out the chef lying on the floor with a stubbed knife. Without clearly thinking, he took out the knife and ran away when witnessed by a deliverer who happened to drop in. Ryōsuke, who sometimes visited the store commented that the taste of the dish had not changed much over the years. The kuitan reasoned that the change in the dish’s taste must be a clue to the case.
Inside of the surrounded office, the members of the agency attempted to recreate the taste that the man remembered during his visit to the restaurant. It turned out the type of water used for cooking pasta was the key to the change in the taste of the dish. The killed chef used in cooking pasta hard water, which coats the surface of pasta in the process and makes pasta tasty. The pasta the man had at the restaurant turned out to be cooked in tap water, which resulted in a different taste. In the end, the waiter whom the man met in the restaurant was the suspect.
