The Restraint Lord's Gentle Favor

Emperor Xiao Ze of the Southern Dynasty personally leads an army to battle, only to find Prime Minister Li Jingxuan forcing a coup, killing the Empress, imprisoning his trusted confidant, and locking up the Crown Prince. Xiao Ze dies on the battlefield unaware that the empire has changed hands. Li Jingxuan establishes the Northern Capital, building the Nanjun to imprison former dynasty loyalists to prevent the Crown Prince from rebelling. To protect his family, the Crown Prince transforms himself into a ruthless demon who kills indiscriminately.