Shibuya, Tokyo, is bustling with the Halloween season. A wedding is being held at Shibuya Hikarie, where Detective Miwako Sato of the Metropolitan Police Department is dressed in a wedding dress. While Conan and the other invited guests are watching, an assailant suddenly bursts in, and Detective Wataru Takagi, who was trying to protect Sato, is injured. Takagi survived and the situation was settled, but in Sato's eyes, the image of the grim reaper that she had seen when Detective Matsuda, the man she had been in love with, had been killed in a series of bombings three years ago, overlapped with Takagi's.

Doctor Shiro Kubo, whose family had a severe accident leaving the mother in a coma, is called to treat a strange disease. His daughter is suspicious of the woman who claims to be her mother after leaving the coma. Who is the woman who pretends to be her mother? A father must do everything he can to bring tranquility to his family.

All unemployed, Ki-taek's family takes peculiar interest in the wealthy and glamorous Parks for their livelihood until they get entangled in an unexpected incident.