The Proud and Wicked Woman and the Cold King

She was an ordinary junior disciple, yet she was branded a master-killer and usurper. He was a demon king who ruled the martial world, yet hid his kind nature beneath a cold mask. She swore to avenge herself, and he devotedly stayed by her side. When a mystery about her origins is accidentally unveiled, how will she face the truth? Caught between hatred and love, how will she choose? In the end, who will master this world of martial intrigue and romance, and become its true ruler?