Jiang Baoning, the Princess of Jianan, who grew up in the deep palace, is carefree but knows that there is no freedom in the palace walls. She is unwilling to be a puppet in the palace walls, so she uses her intelligence to resist the fate of becoming a tool of palace fighting; Li Qian, who was born as a guard of the imperial army, strives to seek a high position in the palace in order to uncover the truth of many years ago, just to get relevant clues. Two people with very different personalities meet by chance and fall in love with each other. In order to change their own destiny, they work together, hoping to break through the barriers of identity and spend their lives with the one they love.