By an unexpected opportunity, Xiao Liyang, a modern medical girl, traveled through time and became the eldest princess Liyang in "Nirvana in Fire". She was also the eldest princess Liyang after the love affair. The tragic modern girl came to ancient times, but she was pregnant and married to an unideal marriage partner - Xie Yu, a junior officer of the Red Flame Army despite being a marquis. How should the girl Li Yang, who has never watched "Nirvana in Fire", deal with the political turmoil in Daliang Kingdom?