Going through a typical morning, suddenly Gildersleeves has a sneezing fit. Will he be able to control it so he can conduct business today? He goes to the doctor, Frank Nelson, who wants to charge big bucks for a lenghy series of house calls to learn what in the house could be the cause of the allergic sneezes.
Meanwhile, Leroy wants to build a tree house, and with help from Gildy, and taunts to his uncle by Judge Hooker, the job gets done. To prove his youthful energy to the judge, Gildy shows off. He climbs to the top of the tree house for a look from on high.
There’s bad news, and good mnews. The bad news is that Gildy has fallen through the trap door on the tree house roof, and gotten stuck. The good news is that he hasn’t sneezed once, since being stuck in the tree. There’s more good news when he discovers the source of the sneezes is from Marjories new cat. Despite turning away a rescue attempt from the fire department, Gildy’s allergy also provides the solution to break loose of his tree house prison.