When Mike and Debi, The Heffernan's new neighbors, give them the opportunity to go on a luxurious vacation with them, it's an opportunity Doug and Carrie can't turn down. The trip is quite expensive, but they decide that they deserve a little pampering. Unfortunately, before they leave on the trip, Doug discovers that they have a mold problem in the house. He doesn't want to cancel the trip, so he decides not to ruin it by telling Carrie about the serious mold problem.
Midway through their trip, Arthur calls to let them know that the mold problem is much worse than expected and the treatment to clean it up is going to cost several thousand dollars. Doug has to tell Carrie about the problem because they can't afford to continue their luxurious treatments on vacation and still have the money to pay for the mold removal.