Aya, who made a promise with Shinichi, comes back to his house to ask help for a case involving her grandma and her daughter that died at the age of 17. Conan solves the case and reveals that the promise was that in four years, when they meet again, Aya would be a real actress, and Shinchi would be a real detectiive. The episode ends with Conan getting a text message from Ran to Shinchi asking what the promise was.