Larry, Curly, and Moe are in prison. They get a letter from their mother. Their father (Curly) left her for a blonde gold-digger and she needs help to stop the blonde. The boys get there right before the wedding.
The narrative drive isn't that driven. I have to think that once the boys get back home. There must be something they could do right there and then to stop the wedding. How about this? They knock out their father and Curly can imitate his father. All hell breaks loose as the father regains consciousness and it's Curly vs Curly. Done! I've written something 10x more interesting and more screwball fun. It doesn't really make sense that the father shaves his face to look like his son for no apparent reason. The twinsie chase is lots of fun and it's a good third act but this could have been better.