When Hank falls through his kitchen floor, he discovers the underground escape tunnel Dale has been building. Hank is so upset when the house is red-tagged for repairs that he orders the guys to help him make some fixes.
The Hills are forced to move in with the Gribbles, but the tension is thick when Dale's annoying habits threaten to push Hank over the edge. When Hank accidentally cuts Dale's finger, the guys rush Dale to the hospital. Dale and Hank continue their squabbling, causing the police and a nurse to dismiss their fight as a lovers' quarrel.
Dale orders that the police press charges against Hank. Hank is slapped with a restraining order and must move in with Cotton and attend an anger management course. Hank befriends a man at the course, but his new friend soon dies after a heart attack. While at the funeral, Hank realizes he must control his anger or he will suffer the same fate.
A much calmer Hank then becomes too passive, and his friends and Peggy try to get the old Hank back. When the home inspector attempts to demolish Hank's and Dale's homes, Peggy and Dale beg Hank to do something. The old Hank returns and, seething with anger, puts a stop to the demolition.