Conmen Roy and Frank start their scam by calling victims and trying to sell their customers water filtration systems for hundreds of dollars, which were available for just $50 in actual stores. The two conmen use many classic social engineering moves, such as passing the phone from Frank to Roy who poses as Frank's boss, giving the operation more credibility and playing with victims minds to make everything more realistic and gain their victim's trust. There are many more social engineering techniques used during the story. It is a good way to visualize some of the techniques that you will read about in this book.