When Homer agrees to allow an OmniTouch cellular phone tower to be placed on the roof of his house, Lisa begins to grow increasingly irritable. Seeking a solution to her tension and stomach aches, Homer takes her to a New Age store, where the salesperson recommends Sensory Deprivation. While resting in a tank full of water, Lisa has a series of visions that show her how much her father loves her. Homer, meanwhile, is in his own tank, which somehow drifts out of the store and sends him on an entirely different journey. When they each emerge from their deprivations, Lisa and Homer have a new understanding of their relationship and agree to spend more time together by going to the demolition derby.