After being kidnapped and forced to work as a servant in the rear palace, former apothecary Maomao inadvertently draws the attention of the higher ranks when she investigates what's causing the emperor's infant heirs to fall mysteriously ill.

Maomao tries to settle into her promotion to lady-in-waiting and food taster, but struggles to fend off both boredom and the overly-familiar Jinshi. That is, until she gets an assignment of her dreams: to concoct an aphrodisiac.

Gaoshun goes to Maomao to get her help in resolving the events of the garden party. Later, Xiaolan explains the purpose of the hairpins Maomao was gifted, and Maomao makes a deal with Lihaku in order to finally visit home.

Maomao's peaceful morning at home is interrupted when she's called in to investigate an apparent double suicide at one of the local brothels.

An older acquaintance of Jinshi's dies while drinking at a party. A servant's body turns up in a moat. Both deaths are written off as self-inflicted, but Maomao's keen observations tell her that there's more to both stories.

Maomao confronts Fengming about the dark secret she's been hiding from her noble Lady Ah-Duo.

Discovering that Maomao's kidnappers were connected to Fengming's family, Jinshi is faced with a choice between keeping Maomao in the rear palace where he can be near her or releasing her from her service.

To Maomao's surprise, Jinshi brings her directly to his house instead of taking her back to the rear palace, and tells her she's to work in the outer court. Not only is there much to learn, it seems there's many eyes on her as the new hire.

A shack, a chest of drawers, and a fishbowl are all that a talented metalworker leaves to his three sons upon his death. Maomao is assigned to investigate how these strange inheritances all fit together.

Back at home, Maomao visits an annex building at the Verdigris House that hides one of the brothel's secrets. Lakan continues to antagonize Jinshi as his connection to Maomao becomes clear.

A discussion with Lihaku about recent events leads Maomao to realize that the mysteries she's helped to solve are connected. As the final piece of the puzzle falls into place, she rushes to stop impending disaster.

No longer willing to keep running away from Lakan, Maomao decides to face off against him. She challenges him on his own turf, in a chess match.

Lakan must now choose a courtesan to buy out. As a high-ranking military official, he can afford to freely choose, even from one of the Three Princesses. Who will he choose? Who does Maomao really want him to choose?