Complex sentence: Rakesh, who now knows Guru's identity taunts him over the phone before killing Aisha's father and then surrenders himself to Guru who almost kills him but Caesar calls up and says that he has killed Rakesh's wife and asks Guru to finish off his son.
Split into simpler sentences: Rakesh, who now knows Guru's identity taunts him over the phone, before killing Aisha's father and then surrenders himself to Guru who almost kills him. However, Caesar calls Guru at that moment and says that he has killed Rakesh's wife and asks Guru to finish off his son.