A young girl contacts the Narumi Detective Agency about her missing grandfather. But what does her case have to do with Shadow Fuuto?
He figured out what the valve was for, 
questioned me about it,
،اكتشفَ الغرضَ من الصمّام وسألَني عنه
Er ist dahintergekommen,
wofür das Ventil gut ist,
Ha capito a cosa serviva la valvola,
mi ha fatto delle domande
Ele perguntou pra que a válvula servia, 
me perguntou a respeito,