Henry is a criminal who is a member of a gang. He used to be a part of all the organized crime their team did. Once henry was getting exhausted about the things he is involved with and started being careless about the gang.

The team gets in trouble because of him and one of their teammates starts arguing with henry and got stabbed by henry. (He died in the spot)
The member who died was brother of another gang member and he was being crazy to take revenge.

After few days later when henry was having dinner with his family (His daughter and wife) they got brutally murdered by gunshot.
Henry was devastated and crazy to take revenge for his family.

As he thought the murderer might be the gang members of him, he starts killing every member of that gang.