When a little boy is caught in a devastating fire, the Junior Detective League is on the case! Conan suspects arson, but to decipher the clues his pint-size client left behind he'll have to think like a real first-grader!  Then Conan tracks a serial killer who murders his victims with a hammer...a killer no one has ever seen. And Richard Moore is prepping for his latest celebrity TV appearance when he stumbles upon a death by poisoned coffee. Can Conan brew up a solution to the caffeinated crime?