Complex sentence: After the ball, Carina is kidnapped by agents of the Empress Dowager, who are working with Chun; they trap her in a wardrobe at Yesan's house.
Split into simpler sentences: After the ball, Carina is kidnapped by agents of the Empress Dowager, who are working with Chun. The Imperial agents kidnap Carina and trap her in a wardrobe at Yesan's house.