Shen Huaibi (the heroine), the master of incense making in the former dynasty, was tasked with guarding the jade ultimatum, but was involved in the royal bloodline dispute due to the "wrong baby case". Three years after she faked her death, she transformed into a mysterious incense maker and sneaked into the palace. However, she reunited with Dongchang Admiral Xie Nanfeng (the male protagonist), a powerful eunuch who was actually the prince left behind by the late emperor among the people. The two were forced to cooperate because of a forbidden aromatic recipe "Xianghunyin" that can tamper with memory, but they gradually uncovered the truth about the baby change sixteen years ago, the "immortality sacrifice" conspiracy of the twelve aristocratic families, and the revenge plan of the twin sister Xiao Wangshu (a witch from the north).
Purpose: To tear apart the lies of power with twin flesh and blood, proving that love is an intangible inheritance that will never fade.