After a brother suspects that his troubled model sister's death wasn't a suicide, he enlists the help of private investigator Cormoran Strike to investigate the matter.
After the police refuse to do further investigations into Rochelle's death, Strike finds out that Lula was searching for her biological family.
As Robin finds out crucial information from a boutique Lula visited, Strike makes an important discovery regarding the CCTV.
Strike takes the case of the infamous writer Owen Quine who was gone missing, after his wife Leonora asks Strike to find her husband.
Robin sees a TV interview where Fancourt admits that he's read Bombyx Mori in spite the fact that he previously denied it.