Complex sentence: At the time of his imprisonment, his brothers are killed by Ajgar Juraat (Amrish Puri) and as a result of this, he vows that he shall take revenge on Sunny by killing him.
Split into simpler sentences: At the time of his imprisonment, his brothers are killed by Ajgar Juraat (Amrish Puri). As a result of this, he vows that he shall take revenge on Sunny by killing him.