Wen family's fourth young miss Wen Miao has long been troubled by bizarre dreams. By chance, she obtains an ancient jade pillow and finally sees the face of the mysterious man in her dream, who turns out to be the long-deceased crown prince Qin Heng. Qin Heng is trapped in an underground palace and has lost contact with the outside world, with only Wen Miao able to converse with him in her dreams. From initial mutual guard, the two gradually reach cooperation. To search for clues to past events in the palace, Wen Miao begins taking action according to Qin Heng's guidance. Meanwhile, she must also face misunderstandings and disputes within her family. Amidst the intertwined experiences of reality and dreams, a long-dusty court past gradually emerges.