Nearly 20 years following the onset of the initial"Brady Bunch" the children have grown up and have children of their own. Everybody is having a wonderful time at your family house for Christmas, until Mike learns of a structural problem in one of the buildings he constructed. As he is scrutinizing the problem, the construction collapses, trapping him inside. They fear the worst, as the entire family waits by the pile of rubble. Can Dad be right?