Heiji has been lonely in 4 months.He has been missing his friend,but he couldn't remember his face nor where he lived. What he only remember about him is that he fought against a organization. But he keeps thinking about him,what he looks like and his intelligence. He is sure that they meet again.

One day,while reading one of Ellery Queen's books,someone knocked at the door. Shizuka Hattori rushed to open the door. When she opened it,she saw a mailman.

"Is this the Hattori residence?",the mailman asked.

"Yes,it is.",Shizuka answered.

"I'm looking for Heiji Hattori. Is he here?",the mailman asked...