Phryne investigates when a clothing factory worker named Daisy is killed by the factory equipment. Dot gets a job in the factory as a tea lady, handing out tea at break time. She learns of illegal overtime work. Roderick Gaskin, owner of the factory, dies and falls dramatically from an upper floor, landing in front of Dot. His death proves due to bleach added to the vial of digitalis, his heart medicine. Dr MacMillan administered it without inspecting the vial for holes. Miss Fisher gets a letter from Murdoch Foyle, the man who killed her sister, now in prison, promising to tell Phryne what happened to Janey if Phryne gets him out of jail. She visits him, but her anger stops her from making such a deal.