Complex sentence: Sophia assumes the throne after the Emperor is killed during a surprise attack at the capital by the Disith nation and pleads for an alliance with Disith in order to capture "Exile" and end the Guild's control.
Split into simpler sentences: Sophia assumes the throne after the Emperor is killed during a surprise attack at the capital by the Disith nation. She then pleads for an alliance with Disith in order to capture "Exile" and end the Guild's control.