Angelo's Stand ability was brought forth by the mysterious bow and arrow, and apparently they're also connected to DIO. After defeating Angelo, Jotaro thought that the danger had left the city, and tries to find the whereabouts of the bow and arrow. A few days later, Koichi is walking home with Josuke, and they pass a house that should be empty...
But there was one thing 
that I didn't understand.
.لكن ثمّة شيء واحد لم أستطع استيعابه
Aber eins war mir
noch nicht ganz klar.
Pero hay algo que no comprendo…
Pero hay algo que no comprendo…
Mais il y a une chose
qui nous échappe toujours.
C'è una cosa, però, che non ho mai capito...
Mas tem uma coisa que eu
não tinha entendido até agora.