Tuoba Tang, the least favored and foolish princess of the grasslands, is tricked by her elder sister into taking her place in a political marriage and marrying Xiao Jin, the Sheng Kingdom's emperor, rumored to be bloodthirsty and cruel. Unexpectedly, she touches the emperor's heart. Seeing that her mind is like a child's and that she is innocent and defenseless, Xiao Jin keeps her by his side. In a harem full of schemes, Tuoba Tang gradually melts the tyrant's icy heart with her clumsy sincerity. He orders wicked servants beaten to death, slaps the sister who bullies her, and even personally applies medicine to her wounds. Everyone sees her as a discarded pawn, yet in the simplest way, she becomes the tyrant's one and only cherished love.