Conan, Sonoko and Ran visit Masumi's place, which is a room in a hotel. They meet a romance novelist who is planning on finishing the writing of one of his serials of which a group of editors are eagerly awaiting. He challenges the editors to eat a bunch of food prepared for them with whoever eats the most getting the author's attention to finishing their manuscript. However, later on the author's assistant is found dead in her room one floor below.