Miss Adam is a nurse, not a detective - at least, not technically speaking. But while working as a nurse, one does have the opportunity to see things police can't see and an observant set of eyes can be quite an asset when crimes happen behind closed doors. Sometimes Detective Inspector Patton rings Miss Adams when he needs an agent on the inside. And when he does, he calls her 'Miss Pinkerton' after the famous detective agency. Everyone involved seems to agree that mild-mannered Herbert Wynne wasn't the type to commit suicide but, after he is found shot dead, with the only other possible killer being his ailing, bedridden aunt, no other explanation makes sense. Now the elderly woman is left without a caretaker and Patton sees the perfect opportunity to employ Miss Pinkerton's abilities.