I remember watching this movie when I was a little kid (though, I probably shouldn't have). The title had something to do with dragons, but the movie itself did not.
The movie was about a woman who was shopping with her young son, possibly for a Halloween costume, when a group of masked men came in, and one of them shot and killed the kid.
The remainder of the movie was about the woman seeking out revenge. She may have been wearing a short blue wig at one point.