While Takedera Hitoshi was wearing a costume, his coworker saw him and became frightened, which ultimately caused him to slip and fall to his death. While there were no malicious intentions, he still caused an accidental death, and it's unlikely he'll be cleared of charges. Yet, after questioning office workers who witnessed the incident, Conan and the Detective Boys suspect there may be more to the case.

It started when the idol Risa Purple was having a concert, but in fail, they kidnapped Ran as Risa Purple After the confusion caused by the sprinkler system going off, two assailants attempted to kidnap Risa. Ran dressed in her Risa cosplay charged the stage and tried fighting but was tazed and carried off by mistake by the culprits.