When questioned, Clarissa and the guests all lie about the facts, hoping to cover up the murder that it is thought that Pippa has committed. Clarissa on being asked to tell the truth, changes her story a number of times and gets herself entangled in a 'spider's web'. The police soon find that Costello's body is missing. It was taken by Miss Peake to an upper bedroom so that the police wouldn't come across it while they searched the house, and the individuals are interviewed. Later, when Jeremy is alone, in an attempt in pretending to comfort Pippa, he tries to smother her with a pillow, but stops as Clarissa approaches him. Clarissa, who is keen and acute at understanding things, discovers that it is Jeremy who had murdered Charles Sellon, an antique shop owner and the previous owner of the manor house, because he had something valuable in his possession. The item which Jeremy has been looking for, is somewhere in the house and not the antique shop. That was why Costello approached Clarissa, thinking that she was Mrs Brown, the owner of the manor house and the partner in his antique shop business. It is then revealed that Miss Peake is Mrs Brown (Clarissa is Mrs Hailsham-Brown). Since Jeremy was on the same mission as Costello, Costello had to be eliminated. The item which the rogues have been searching for is a postage stamp, which would have fetched the sum of £14,000. Jeremy tries to kill Clarissa as she is the only one remaining who knows his secret. However, the police are eavesdropping on them and arrest him. The three guests leave and Henry returns home. Clarissa learns that the Premier was not at the airport as part of a security set up, but is still expected to visit the house. The play closes as Clarissa and Henry get ready for the visit of the Premier.