We are introduced to the good natured Mr Utterson, a lawyer. He points out to friend a strange door and the friend, Enfield, has a story to tell about it. Enfield had witnessed the cruelty of a man to a passing child, and had obliged the man to pay compensation to the family. The cruel man was named Hyde, but the cheque he used came from a friend of Utterson's, the very respectable Doctor Jekyll. Utterson supposed the evil man was blackmailing Jekyll