Shinichi's secret becomes known to Kuramori, the private investigator hired by Tamura. Shinichi tries to confide in Satomi, but his unsuccessful attempt only drives a wedge between them. Shinichi recruits Uda's help to break the impasse.
but if they agree on predetermined 
signals in advance,
،ولكن إذا اتّفقوا على إشارات محدّدة مسبقًا
aber wenn man vorher
einige Signale ausgemacht hat,
pero si deciden una señal 
predeterminada con anticipación,
pero si deciden una señal 
predeterminada de antemano,
mais s’ils conviennent
de signes au préalable,
mas, se combinarem um 
certo sinal de antemão,