Agasa and Haibara become stranded when their car breaks down. They receive a ride from a suspicious man and woman. Haibara suspects they are part of the Black Organization when she learns that they are interested in meeting with Kogoro's assistant, C... (more)onan and how the man wants to show them his "half-kill". While at a rest area, Haibara contacts Conan who proceeds to travel to their location on is skateboard. Once there, Conan reveals the two suspicious people to be Kansuke Yamato and Yui Euhara. At Kogoro's office, Conan explains that he found out who they were due to their Nagano dialect. He explains that "Half-kill" was an old fashion nickname for botamochi due to the fact the ingredients is only half grounded when made. Yamato and Euhara reveal to Kogoro they came to ask him to solve a murder with the dying message to be a red wall.