This recap of the Netflix K-Drama Alchemy of Souls season 1, episode 20, the finale and ending explained, contains spoilers.
In front of the King, Jin Mu says that he found Naksu to clear his name and reveals his hopes for Songrim to be strongly punished for what happened. Dang-gu informs his uncle that he believes his friend was already aware of Mu-deok’s real identity, as well as the fact that Jin Mu is raiding Jeongjingak to find proof of said claim. After Maidservant Kim vehemently cries over how Jang Uk’s death is being treated “as if he is a criminal,” unable to have his cremation altered to something more respectful, we cut to the proceeding. Rather interestingly, the controlled soul shifter recalls her own father when hearing the cries of Cho-yeon, ready to head the order of Jin Mu to murder those responsible for his death. Next, we watch the wedding between Dang-gu and Cho-yeon, one that looks set to be a celebratory occasion despite some petty squabbles between the leaders of Songrim and Jinyowon. Unable to be calmed down by the former assassin’s rationale that he will only feel worse should Uk stick around, the Crown Prince vocalises his displeasure in Mu-deok being with her partner, requesting that they go far away so that they can stay safe from his potential “violent, wicked” feelings that would see an end to the pairing’s relationship. Meanwhile, the Crown Prince tells Jin Mu that he will cast Jang Uk, who is believed to be without the ice stone, far away, and orders the assistant Gwanju to admit to his crimes by the end of the day. Unfortunately for the royal, he does not get Park Jin to crack, meaning that Jang Uk’s identity is still not properly admitted to. As such, Jin Mu heads out to confirm that the maid is in fact Naksu, manipulating her with the divination bells. Recalling the information that a divination curse on the Soul Ejector can control the soul that uses it, Jin Mu picks up his newly acquired bells, ready to make any given soul shifter run wild. Later on, Park Jin discusses Jin Mu’s knowledge of Jang Uk’s reality with his partner, informing her that the Cheonbugwan leader turned Cho Chung into a monster solely to torture the Gwanju. Finding out that he was given the missing So-i’s blood, the genius mage trusts that he will get better soon and asks that his condition is kept a secret.