The Apothecary Diaries Season 3 Episode 4 is finally here, and this week's installment had every element that made this show popular in the first place. Fans are going to enjoy watching it because it combines mystery, comedy, and political intrigue. Interestingly, Maomao is making substantial progress with her investigation around the locust plague.
What makes this episode stand out is how it brings back Shisui's research into focus while also revealing a little more about Suirei's past. Meanwhile, Jinshi and Maomao once again share a funny interaction in The Apothecary Diaries Season 3 Episode 4 before it ends up revealing the White Lady's face. This episode might have taken a slightly relaxed approach to storytelling, but the discoveries made do suggest that the current threat is extremely dangerous.

Additionally, the ending introduced a new development that could potentially have consequences for the story as it moves forward. One of the major highlights of The Apothecary Diaries Season 3 Episode 4 was Maomao visiting Ah-Duo's villa. She met with Suirei and got more information about the former doctor's fate.
During their conversation, Maomao discovers that the former doctor experimented on himself using the resurrection drug to create the illusion of his death. But it turns out that using these drugs ended up seriously affecting his nervous system, and he eventually got dementia. This conversation is important because it also reveals that Suirei was not responsible for researching the locusts.
It turns out that this work belonged to Shisui, which made Maomao start thinking about the events that took place before she was kidnapped. In The Apothecary Diaries Season 3 Episode 4, she is able to figure out that Shisui might have left the missing book in the palace clinic by choice. In her research, it is revealed that these insects are dangerous, and there is also information about how to develop insecticides.
Jinshi and Maomao deliver the episode’s funniest moments

While the locust investigation was the main part of the story, Jinshi and Maomao once again manage to steal the show with their interactions. She has an unconventional solution to the potential food shortage. Maybe if people are encouraged to eat grasshoppers, this could reduce the insect population and at the same time provide an additional food source.
But Jinshi is not a fan of this idea; that is when Maomao decides to just feed him a cooked locust. He is disgusted by it but ends up accepting the insect directly from her hand. His willingness to endure the experience makes the scene particularly entertaining, especially as Maomao appears to enjoy watching him struggle.
The Apothecary Diaries Season 3 Episode 4 also includes a humorous conversation about Maomao’s ideal romantic partner. Her description does little to convince those around her, who appear to recognize that she is not being entirely honest about her preferences.
The White Lady’s face reveal in The Apothecary Diaries Season 3 Episode 4

Another highlight of The Apothecary Diaries Season 3 Episode 4 was the reveal of the White Lady. We get to see her face, which raises questions about her identity, because we still do not yet know who this lady is. Her appearance came during the latter part of this episode, but her introduction ended up being an effective cliffhanger.
Her addition to the story suggests that Maomao could soon be facing a mystery that is beyond the events that are happening in the palace. With a potential locust plague looming and the White Lady entering the picture, Maomao’s next investigation could prove more complicated than ever.