Modern young man Fang Yi'ai travels back to the Tang Dynasty overnight and becomes the second playboy son of a chancellor's household! Even more absurdly, the dignified Princess Gaoyang is invisible to everyone in the entire court except him. Only he can see and interact with her. To everyone else, she's thin air, but to him, she's a stunning beauty who loves to act coquettish and trade barbs! With his special advantage, he makes instant noodles, improves cement, and experiments with roller skates, making a sensation throughout Chang'an! She can only appear when she stays close to him, acting haughty and stubborn even when her feelings betray her. The two match wits and spar with each other, gradually falling in love! Court intrigues, palace rivalries, jealousy, and the princess's little tantrums take turns unfolding as this bickering pair stirs up a tremendous commotion in the Tang Dynasty and sparks sweetness wherever they go!