“The Twisted Scarf” finds Nero Wolfe having a gardening group and their guests visiting his orchid collection. During the event, a young woman confides in Archie that she has recognized one of the guests as having killed a good friend whose murder has gone unsolved. She gives him no more details and Archie is called to assist with the guests. While he is gone someone murders the young woman. Wolfe has little to go on to discover who murdered the young woman. His only clue is that it had to have been a guest and he believes that the murderer did not leave the scene of the crime.