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.

Detective Takagi and Chiba are investigating the robbery happened in Beika involving 30 million yen. However, the robber died in a car accident and the money he stole was not there.