Coffee With a Shot Of Murder

A waitress, who was serving coffee to her costumers in the shop she worked in, Stress Breaker, accidently overhears two businessmen talking about a murder. The thing is that they are very well-known businessmen. Almost everyone knew the names of Mr. Jasper Campbell and Mr. Raven Hallowes. Miss Ophelia Abbott was very shocked to hear this, so what will she do? Call and inform the police ot wait and watch? And whom are they planning to kill? Will they be successful?