During a visit to the Tottori Sand Dunes, Kogoro, Conan and Ran come across a case. Shuko, wife of the Kumado family's eldest son, was attacked and tied up during a home invasion robbery, and the family's heirloom incense burner was stolen. A pedant found at the crime scene casts suspicion on the family's former housekeeper Naomi Senda, but Kogoro and his family saw her at the sand museum at the time of the crime. Later, head of the household Isao Kumado receives an e-mail on his phone ...