Shechem was the most honored man in his father's household. Additionally the city where they lived was named Shechem, too.
One day Dinah went out to the land. There Shechem saw her and raped her. He then proposed to the sons of Jacob to be allowed to intermarry. They accepted but only under the condition, that Shechem and all his people would circumcise themselves. So they did. After three days, two sons of Jacob (Simeon and Levi) went to the city and killed all male people and took Dinah with them. When the other sons of Jacob saw the destroyed city, they took the livestock with them.