Homer is having trouble getting it on with Marge. They buy an audio book to rekindle their sex life, while Bart gets a book about the UFO conspiracy. Homer and Marge start trying the books ideas, but nothing works. Abe tells Homer of a home remedy that will give him the instant boost he needs. After it works like a charm, Homer has the idea to market it. He and Abe pitch the tonic at malls to start and everyone begins buying it. The children begin to notice that all of their parents have disappeared. Homer and Abe then go on to neighboring towns and they start to get on each other's nerves. Bart and Milhouse start to form conspiracy theories as to where all the adults are. Abe and Homer go to their old house and relive the good old days. This puts them even more at odds and Homer deserts Abe. He is furious with him. Homer decides to spend more time with his kids. Abe gets Barney to replace Homer as he continues to pitch the product. Homer's half-assed over-parenting does not work very well on his kids. He goes back to the house for inspiration and meets back up with his father, but their loving reunion is soured when the house goes up in flames.