Steed is developping and printing holiday snapshots when Emma enters with a big key which belongs to a house she inherit from an unknown uncle. She puts the key onto the photopapers for a moment. When Emma leaves and Steed prints his photo's it appears the print of the key is seen on the photo's. Radioactive? Steed doesn't trust the case and phones the notary who is looking after the interests of Emma. He tells Steed she never had an uncle who was deseased shortly. Steed decides to follow Emma.