Meg and Michael have purchased their home together and it is from the cantankerous Sprocket family. They won't clean it up, fix the major issues and want money from the sale of all the stuff in the house, without doing any work.
So for months, Meg has been organizing, selling and preparing for a huge yard sale, to get rid of the items found in the house and getting her family to come in and help at the sale, allowing her large extended family to also set up tables to sell off things as well. True to form, people who want to go to a yard sale, want to start earlier than anyone else and have started ringing the door bell on her house at very early hours, while she and all the house guests are sleeping in sleeping bags on the hard floor because she and Michael cannot have any of their own items in the house, because the Sprockets will accuse them of stealing from the estate.
One of the Sprockets (Barrymore) has shown up and said he is there at the wishes of the family to get their fair share of the sale.
While all this is going on, Gordon (you-thief) has also shown up early and been doused with water for trying to gain an early entry. Gordon has many enemies due to poor business practices, a poor marriage, and just generally being a poor person. When he is found murdered in a trunk, found in the barn, locked, the first person suspected is a friend of Michael's is suspected. Meg feels that she needs to prove that he didn't do the deed.
She finds that many of the people that were interviewed by the Police Chief, lied and she finds the truth and keeps going further along to find the truth.
Another fun story, showing that having a yard sale can be very difficult and frustrating. People showing up before people are ready and people asking for lower prices on items because they are out to get a good deal. People parking wherever to get to the sale.