The episode starts with Cormoran Strike trying to prove Leonora Quine's innocence. He and Robin Ellacott start looking at Andrew Fancourt, an author who has always hated Quine. While he previously denied not knowing anything about the contents of Bombyx Mori, he accidentally reveals that he has in fact read the manuscript during an interview. This leads them to investigate the relationship Fancourt had with Quine. Over lunch with Liz Tassel, she reveals that Fancourt had left the agency because he accused Quine of writing a parody novel of his wife's book. His wife had committed suicide because of it. They also talked about Tassel's personal feelings for Fancourt, with the lunch eventually ending with Liz having an emotional outburst.
Robin and Strike attends a publishing party that celebrates the return of Fancourt to the publishing house. They chat up Fancourt to find out his side of the story. Their whole conversation centered around the parody written, and how Quine wasn't a great writer. He just confirmes what everyone has been saying about his relationship with Quine.
With the new lead they uncovered, they began to work on what happened. Strike was to discover what Lis Tassel's involvement was while Robin looks for the original manuscript. Strike figures out that the argument Tassel and Quine had was an act, and Robin finds a typewriter ribbon that revealed parts of the manuscript - and the names used weren't those in the distributed book. They also had a literary critic compare writing samples, with the critic deducing that Andrew Fancourt did not write the parody. The writing style of the parody however was similar to the manuscript and a short story in a magazine.
At a private dinner, Strike clears accusations about the parody. It turns out that Liz Tassel wrote the parody and the manuscript. Quine knew about the parody and blackmailed her for years to keep the secret in exchange for providing for his family. The whole fight and disappearance was an act in order to sell books, but Tassel killed Quine and revised his manuscript underneath the premise of Quine's revenge.
The two episodes were just okay. This is from a personal bias as I am not a fan of stuff with occults and demonic, dark, cult-like things. I knew that I wasn't going to like this as much as I did with The Cuckoo's Calling. The way the narrative moved at the last twenty minutes already suggested who killed Quine, it was just the matter of gathering proof. I will still be continuing with the show; there's going to be a bit of a wait for the next one.