Sonoko has taken Conan to the "Candy House", in there, Conan meets a group of three masters who make pastries and puddings: Maeda Gou, Fujino Yasuo and Morimoto Tomomi, and they have tasted the things that the three of them have made, which are very delicious. However, Morimoto has had a quarrel with their manager Hashigaki in front of them. Then, after a while, they suddenly hear Maeda's scream. When everyone has gone to see what is happening, they see the pitiful sight of Hashigaki who has been beaten to death, and must solve the mystery of the murder.