In the Day We Flipped S01 E19 Episode 19

The modern mortician Zhang Chu Xi accidentally transmigrated into the body of the "Queen" of the Lan Dynasty, whom the prince wanted assassinated. Zhang Chu Xi, who is determined to have a complete relationship, fights through the fog and dangers to survive amidst the bewildering and confusing royal schemes, and also falls in love with her would be assassin Su Ning Ze in successive incidents.