La fille naturelle d’un dignitaire du préfet de Séoul – héroïne lettrée, jeune, courageuse, déterminée – occupe les fonctions de sage-femme et de légiste. Elle est appelée pour enquêter sur une étrange série de meurtres apparemment sans rapport les uns avec les autres.

Une nuit, alors qu’elle exhume secrètement un cadavre pour une autopsie qui lui a été refusée, elle rencontre un jeune fonctionnaire qui n’est autre que le fils caché du roi Taejong...

汉城府，月明之夜

*有着伤痛过往的雅兰，成为了女检尸官**

    雅兰成为了杀害父母的人判汉城府事的庶女。她为了复仇当上女检尸官，日夜验尸，努力查明被害人的死因。然而某一天，一起震惊汉城府的重大案件发生了。在发生火灾的木觅山洞窟中，人们发现了六具尸体。

    雅兰与司宪部监察尹五、汉城府判官韩石一起对木觅山案件进行调查，但真相就像是被迷雾覆盖一样模糊不清。然而，当其中一具尸体被确定为权势滔天的兵判独生子许青后，所有人的目光都聚集在汉城府。雅兰冒着身份暴露的危险埋头进行调查，发现这起案件的核心是许青。

*关于木觅山案件的传闻与真相**

    由于遗属和本案相关人士保持沉默，调查一度陷入了困境。此时，汉阳地区开始流传奇怪的传闻，传闻指出傀儡戏（木偶剧）揭露了木觅山案件的凶手。雅兰之前一直在迷宫中徘徊，听说后立即前往即将上演傀儡戏的木觅山。她看完傀儡戏后得知，许青借助兵曹乘舆司进行人口买卖，是他杀害了其他五名被害人。雅兰立即到后台去寻找表演傀儡戏的人，但那里一个人也没有。接着，一个身份不明的人袭击了雅兰，导致她失去了意识。

*要销毁证据的人和要寻找证据的人**

    为了掩盖儿子许青的罪行，兵判试图销毁相关证据和证人，而判汉城府事则出于某种原因与兵判联手。雅兰为了揭露案件的真相并让他们得到应有的惩罚孤军奋战着，陷入了巨大的危机。事实上，判汉城府事之前将雅兰收为庶女有着自己的盘算，但现在他认为已经没有用处了，他把所有的罪名扣在雅兰头上，发布了对雅兰的通缉令。

*隐藏在事案件背后的另一个故事**

    为了洗脱自己的罪名，雅兰找到了世宗，通过物证和人证来证实了自己的清白。世宗将兵判和判汉城府事逮捕归案。然而，雅兰没能找到证据证明判汉城府事杀害自己父母的罪行。她再次陷入了矛盾，究竟是该私下报复凶手还是依法惩戒呢？这时，她得知表演傀儡戏的人就是杀害许青的凶手，而这个凶手是在她意料之外的人！当雅兰知道了这一切的真相，她是否还能够坚持自己的信念呢？

Lady Coroner in Joseon

Aran with a wounded heart becomes a coroner 

Aran pretends to be an illegitimate daughter of the mayor of Hanseongbu (present-day Seoul) who killed her parents. Seeking revenge, she becomes a coroner to collect evidence, and examines bodies day and night to determine the causes of death. One day, an incident shocks the entire city—six bodies are found in a burning cave on Mt. Mongmyeok. Aran investigates the case with Yuno, the inspector from Saheonbu (Office of Inspector General), and Hanseok, the judge from the Office of Hanyang (also Seoul), but the truth remains uncertain. Later, one of the bodies turns out to be that of Heocheong, the only son of the minister of war. Now, all eyes turn to the capital. Aran risks her identity being revealed to focus on the investigation and realizes that Heocheong is the key. 

Rumor and truth of the Mt. Mongmyeok incident

While the investigation goes through a difficult period amid the silence of the bereaved and those involved, a strange rumor spreads throughout Hanyang that there is a puppet show about the murderer. Aran, who has reached a dead end, immediately heads out to Mt. Mongmyeok, where the show was performed. There she learns that Heocheong used Seungyeosa (an affiliated institution under the Ministry of War) to commit human trafficking and killed the rest of the five victims. She quickly heads backstage to see the performer, but the area is already empty. That is when she is hit on the head and passes out. 

Hide the evidence vs find the evidence 

The Minister of War tries to get rid of all the evidence and the witnesses to hide his son’s crime, and for some reason, the mayor cooperates. Aran fights to unveil the truth and bring justice, but instead, faces a severe crisis. In truth, the mayor had his own agenda when he accepted her as his illegitimate daughter, and now, she was no-longer of any use to him. She is soon placed on the wanted list, and it is the mayor himself who framed her for the murder. 

Truth behind the truth

Aran has an audience with King Sejong to clear the false charge. She successfully proves her innocence with physical evidence and witnesses, and the king orders the arrest of the Minister and the Mayor. However, Aran has yet to prove that the mayor killed her parents. While experiencing a conflict of interest between personal revenge and legal punishment, she finds out that the performer of the puppet show was the person who killed Heocheong. And it was someone she has never imagined it to be! The truth is out there now. Can she still maintain her faith?

아란은 학식이 깊고 결단력이 있는 용감한 판한성부사의 서녀다. 시신을 검사하고 사망원인을 파헤치는 검험 산파인 아란은 서로 연관성이 없어 보이는 이상한 일련의 살인 사건을 조사하기 시작한다.

어느 날 밤, 명령을 어기고 몰래 검험하기 위해 한 시체를 파내다가 한 관리를 만나고, 그가 태종의 숨겨진 아들이라는 것을 알게 되는데......