While he recovers from his wound, Conan struggles with the idea that Rachel has deduced his secret and is waiting for him to tell her.; While Inspector Meguire struggles to investigate the murder, Harley is exposed as trying to impersonate Jimmy. But later the Black Knight is revealed to be Jimmy, right in front of Rachel and Conan.; Jimmy implicates the murderer, then has a seizure from the experimental antidote he got earlier from Anita.; Jimmy takes Rachel out to a fancy rooftop restaurant in order to tell her something important. But their meal is interrupted by one of the hotel guests being found dead.; In a race against time, Jimmy tries to expose the murderer before the antidote wears off and he reverts to his child state.; A woman comes to Detective Moore in search of a person, with only a music box for a clue. Their subsequent search leads to a mystery over a missing stamp worth $20,000.; Rachel accidentally points Conan in the right direction in order to find the missing stamp collection.; Using Richard as his surrogate, Conan solves the mysteries of who gave out the music box and where the valuable stamps were hidden.; Anita gives Conan an overly dramatic argument for why he should keep his secret from Rachel. At Rachel's class play, a mysterious stranger takes over the role of The Black Knight. And a member of the audience is murdered.; Jimmy begins to put together what happened. But before he can outline the case against the murderer, he receives an unwelcome surprise.