Ten years ago, Masumi, taken by her middle brother Shukichi and their mother Mary, reunite with Shuichi who did not take the test yet to become an FBI agent in the Atsuhama Beach, Shizuoka Prefecture. Mary had an off-screen fight with him where they both managed to injure each other's eye. Throughout the case Mary warns him to stop investigating the disappearance of his father. The Akai family also encountered Shinichi, Ran, and Yukiko who also happened to be there. Shinchi introduces himself as "Holmes Apprentice". All of them end up being involved in a case where two robbers robbed a watch shop with one of them accidentally got killed in an accident, and the other was still on the run.