Complex sentence: Stéphane believes that Izidor will take him to Nora Luca when the time has come, so he lives in the Roma village for several months in Izador's house, as Izador's son Adriani has been arrested.
Split into simpler sentences: Stéphane believes that Izidor will take him to Nora Luca when the time has come. So, he lives in the Roma village for several months in Izador's house, as Izador's son Adriani has been arrested.