South Boston Irish bad boy Danny Quinn returns back home from New York and gets stuck between his pals, who are supported by one Irish mafia clan, and his family, which are members of another.

Muffin's wedding to Dino Corelli is to be a big affair. Except the ageing priest isn't too sure of the ceremony, only the families actually turn up as the Corelli Italian connection is suspect, security guards watch the gifts rather over-zealously, and Dino's grandma expires in bed just as the reception starts. Could be quite an occasion.