A period mystery mini-drama about rebirth. Using the Jiang family's secret inheritance, the Soul-Returning Incense, Jiang Jianxue is reborn with memories of her previous life. She refuses the marriage in the wedding hall and escapes, entering the Imperial Incense Bureau to investigate the truth behind the Jiang family's execution three years later. Along the way, she uncovers the slow-acting royal assassination conspiracy involving the poisonous incense known as 'Trace-less.' Unexpectedly, she discovers that Yan Wujia has also been reborn. The two go from suspicion and opposition to becoming allies, fighting against a poisoning conspiracy led by the Crown Prince. After the Crown Prince discovers their secret of rebirth, he uses the Jiang family's lives to force her into marriage and seize the incense. Jiang Jianxue turns the tables, exposing the evidence in front of everyone at the wedding ceremony. Refusing to retreat into another cycle of time, she finally confronts the Crown Prince before the Emperor, brings him down, clears the Jiang family's name, and lets go of her obsession with rebirth to spend this lifetime with Yan Wujia.