They were both caged birds used by the emperor to contain the power. They fell in love and cherished each other. They wanted to escape from the power, but they couldn't. She had no choice but to become a puppet of the power and marry someone she didn't love. In order to get her back to him, he embarked on a path of killing, and when their swords met, their relationship had already deteriorated. She wanted to save the common people, and he wanted to keep her by his side, but in the end the love was gone...
Intention: Love in the heart can also change