Homer tries everything to get out of the plant's new exercise program and discovers that being on disability would do just that. With Bart's help, Homer starts eating everything he can, even playdough.
Mr. Burns organizes an exercise program at the power plant. While this program finds some support among the workers, Homer is not among them. After learning that those on disability get to work at home (and not take part in the exercises), he tries to injure himself. When he discovers that hyper-obesity counts as a disability, he decides to put on weight until he is 300 pounds. In this way, he can be legally disabled and force Burns to let him telecommute. Despite Marge's protests that this could endanger his health and jeopardize her attraction to him, Homer engages in nearly unprecedented gluttony. After a mass eating spree, Bart tells Homer they're out of food. Faced with the prospect of another day at work, Homer eats a Play-Doh donut that Maggie made. This manages to push him over the 300 pound goal, but it is then that Bart notes that Homer's gut is caught on a towel rack. Once Homer lets his gut hang down, the scale readjusts to 315 pounds.
A computer work station is set up in the Simpsons home for Homer's position. Homer enjoys working from home: and due to his stupidity he thinks he will get a Tab soft drink if he presses the tab key. Then realizes that all he has to do is press "y" to answer "yes" on the computer, but doesn't read and constantly hits "y". However, he soon tires of the repetitiveness of the situation, and begins to get distracted. One day, Homer leaves a drinking bird hitting the "y" button while he goes out to see a movie. After being refused to be seated due to his size, and heckled by some people outside the theater, Homer returns home, vowing to show that overweight people can be important. Upon his return, he finds the bird has been knocked aside, and a nuclear meltdown at the power plant is imminent. Homer rushes to the plant and bravely tries to take charge. He ultimately saves the day after the ladder to the manual shut down snaps due to his weight. He falls into the release tube where his enormous gut gets stuck and blocks the toxic gas from escaping. As a reward and upon Homer's request, Mr. Burns guarantees that he will make Homer thin once more. After Homer fails with his exercise program, Mr. Burns decides to just pay for the liposuction.