In a series of terrifying X-ray shots of Homer's chest, we see that his heart is dangerously clogged with plaque and doughnut residue and that he is in need of a triple bypass operation. The operation costs $40,000, but Homer cannot afford that much, so he goes to Dr. Nick Riviera, who agrees to do the operation for $129.95. During the operation, Dr. Nick loses his nerve and only Lisa, who has been studying the heart, can talk him through the procedure. Homer recovers and is able to live a long, doughnut-filled life.