Kogoro takes Ran and Conan to a mountain hotel but he mostly enjoys the swimming pool, checking girls out. Once out of the pool, they come upon Eri, who came to this hotel with a few friends, lawyers as well, as part of a lawsuit having to do with a factory and a village in the surroundings. Kogoro and Eri belittle each other just like usual, but Eri says to Ran in secret that she feels like to reconcile with Kogoro, by offering him a tie, but Ran must not say anything for the moment. They also meet Norifumi Saku, a young lawyer that leaves Eri far from indifferent, and it is mutual. They organise a dinner with everyone and they meet Eri's fellow barristers Mikasa, Shiozawa and Usui. Kogoro drinks way too much and starts hitting on Usui, which angers Eri who leaves the table. Some time after, when tempers aren't flaring anymore, everyone looks for Kogoro, who hasn't given some sign of life since a moment. They search everywhere and end by Usui's room, where they hear the ringing of Kogoro's phone from the inside. Some time before, Usui had deliberately brought a drunk Kogoro in her bed in order to blot Eri's copybook and to become the new queen of the Bar. But Usui had been interrupted by a door knock. Later on, when Eri and co try to open Usui's door, they find it locked from the inside with the safety chain, and glimpse an unconscious Usui on the floor. Saku doesn't wait for the groom to come and breaks down the door. Usui has been strangled with a telephone wire, and in the bed there's Kogoro, who wakes up unaware of the hustle and bustle around him.
