The kind and kind old woman Evelyn Mercer lives in a strange way in her small grocery store. But her big family has four good sons with different skin colors. Because the four children were all kindly adopted and raised by her back then: the reckless Bobby, the ugly but upright Anqier, the typical good old man Jeremiah and the enthusiastic Jack. While they honor their mothers on weekdays, they also help poor children who need family affection and care. Moreover, they all love this special family and their kind old mother. A life full of happiness in peace is like this day after day.
An unfortunate day suddenly arrived. When the old mother Evelyn was alone in the grocery store, she broke into a group of brutal robbers. The powerless old lady fell to the ground after a blast of gunpowder. At the mother's funeral, the four brothers gritted their teeth and gathered again, and vowed to find and punish the murderer by themselves and avenge the old mother. Of course, you can't be defenseless against armed bandits, so the four brothers, led by their eldest brother Bobby, searched for Laodice, who had invaded society in those years. Automatic pistols, shotguns and even iron rods became their weapons of revenge.
According to the video tape recorded by the mother on the monitor in the grocery store, the four brothers began to find their enemies in the neighborhood, and the revenge and fighting gradually heated up. The four brothers united as one, and despite the price of blood, they finally revealed the secret behind the murder and punished the murderer of their mother.
