The story of Cain and Abel is about two brothers. Cain was a farmer and Abel was a shepherd. Cain's offering to God was not accepted, while Abel's was. Jealous, Cain killed Abel. It's a tale of envy and the consequences of sin.
The story goes like this: Cain and Abel were siblings. Abel's offering pleased God, but Cain's didn't. This made Cain angry and he ended up murdering Abel. It shows how negative emotions can lead to tragic actions.