In Shanghai in the 25th year of the Republic of China, antique restorer Shen Qingci inherited the "Jingyuan Pavilion" left by his master, but while sorting out the relics, he discovered an ancient bronze mirror engraved with strange patterns. At midnight, memory fragments that did not belong to her appeared in the mirror - the woman in cheongsam calling for help in the fire, the mysterious man handing over a secret message. As strange things happened frequently caused by the ancient mirror, she realized that the disappearance of her master was closely related to the "murder case of Paramount dancer Su Manyun" twenty years ago, and the owner of the memory in the mirror was the deceased that year.
During the investigation, the gentle and mysterious newspaper reporter Lu Jingyuan broke into her life. The two gradually fell in love while testing each other, but they concealed secrets from each other. Shen Qingci discovered that the pattern on Lu Jingyuan's pocket watch was consistent with that of an ancient mirror, and he seemed to be pursuing old cases related to the murder. The memory in the mirror is constantly updated, revealing that Su Manyun's death was no accident, and that behind it was the shady story of the Gu family, the military and political boss.
Everyone around him has his own agenda: the old man wants to destroy the ancient mirror, the Gu family is secretly watching, and even Lu Jingyuan's gentleness has hidden agendas. When Shen Qingci unlocked the complete truth from the mirror - the master was Su Manyun's younger brother, and Lu Jingyuan's father was silenced due to the investigation of the case, she realized that what she inherited was not only an antique shop, but also a battle for justice and revenge that spanned twenty years.
Ancient mirrors reflect not only memories, but also the light and darkness of people's hearts. In old Shanghai where lies and murderous intentions are intertwined, can Shen Qingci and Lu Jingyuan break through the fog and let the truth be revealed?