Here's a summary:
* Setting: A dark and foggy night.
* Incident: Enfield sees Hyde run over a young girl, leaving her seriously injured. Hyde then throws money at a passerby to pay for the damage, acting with a mix of callous indifference and a sense of entitlement.
* Aftermath: The girl's family demands justice but Hyde's influence, wealth, and connections seemingly protect him from any serious consequences.
* Enfield's reaction: Enfield is disturbed and disgusted by Hyde's behavior and his apparent impunity. He feels a sense of unease and moral outrage.
This story is significant because it sets the stage for the mystery surrounding Hyde's character. It sparks Utterson's curiosity and sets him on a path to investigate the connection between Hyde and his friend, Dr. Jekyll.