Nelson Family Matters

Jack's beloved grandma and grandpa are now gone, colon cancer having finally taken Joe away. However, Jack receives an unexpected surprise when he is announced as sole heir to the family inheritance, including his grandparents' mysterious home. He and his wife Jan are now preparing to start their new life together, but nothing is simple with the Nelsons.
Jack's entire family is still a big pain in the backside as he and Jan try acclimating to their new and unexpected existence. Jack is dealing with not only the responsibilities of being sole inheritor but also working to start a business. The Nelson legacy continues to haunt, though, including the house's secrets, one of which are hidden chambers beneath Jack's new residence.
The family continues to break down until a near catastrophe brings them back together. This new catalyst changes some attitudes, and Jack soon finds himself and his father on a trip to discover further family history. What other secret was Grandpa Joe holding onto, and how will its unveiling affect the family he left behind?