
Otto Anderson, a 63-year-old widower, lives in suburban Pittsburgh, Pennsylvania. After retiring from a steel company, he plans suicide, having lost his wife Sonya, a schoolteacher, six months previously.
During a suicide attempt by hanging, he is interrupted by his new neighbors: Marisol, Tommy, and their two daughters, Abby and Luna. Otto has flashbacks to his past; years previously he tried to enlist in the army but was rejected due to his hypertrophic cardiomyopathy. He meets Sonya on a train after returning a dropped book to her.
Otto attempts suicide again, this time via carbon monoxide poisoning. He experiences a flashback to a dinner with Sonya, confessing to her that he is not enlisted in the army due to his heart condition and doesn’t have a job, prompting Sonya to kiss Otto. Marisol disrupts Otto’s suicide attempt, asking him to take her and the kids to the hospital after Tommy fell and broke his leg using a ladder that Otto had lent to him. Otto reluctantly agrees.
Otto has a flashback to his graduation with an engineering degree, when he asked Sonya to marry him. During a suicide attempt by train, an old man faints and falls on the railroad tracks. Otto saves the man and the incident goes viral. Otto then takes in a stray cat, which he had previously considered to be an annoyance. Otto takes Marisol for a driving lesson and they visit Sonya’s favorite bakery, which the couple formerly frequented every weekend. There, he tells her about his friendship with a man named Reuben, the two having worked together to establish rules and order, with Otto as chairman of the neighborhood association board. The two grew apart after Reuben’s preference for Fords and Toyotas over Otto’s Chevrolets and the “coup” of replacing Otto as chairman. Reuben, who suffered a stroke, is now confined to a wheelchair and is cared for by his wife Anita and neighbor Jimmy.
A local transgender teen, Malcolm, recognizes Otto as Sonya’s husband while delivering newspapers and circulars in the neighborhood. Malcolm cuts through Otto’s disgruntlement at receipt of the newspapers when he recognizes Otto as “Mr. Anderson” and recounts that Sonya was his teacher and one of the few people who accepted him as he was. A friendship forms between the pair and Otto fixes Malcolm’s bicycle. After dodging a social media journalist named Shari Kenzie who is attempting to interview Otto in relation to the earlier viral video, he gets angry at both Marisol and a Dye & Merika real estate agent, not wanting to come to terms with Sonya’s death. He attempts to commit suicide by shotgun, but is interrupted by Malcolm, who asks to spend the night after his father kicked him out.
Otto learns that Dye & Merika is planning to force Reuben into a nursing home and take their house, after illegally finding out that Anita was diagnosed with Parkinson’s disease. Otto agrees to help Anita and Reuben. Marisol refuses to assist Otto until he tells her that he and Sonya went to Niagara Falls to celebrate being pregnant. On their way back home, the bus they were on crashed due to faulty brakes, resulting in Sonya being paralyzed and having a miscarriage. The neighborhood was not accessible to Sonya and Otto was voted out of the chairmanship after having a heated confrontation with a Dye & Merika representative. Otto wanted to put all of the real estate companies out of business but decided against it to care for Sonya. With the help of the neighborhood and Shari Kenzie, Reuben and Anita are able to keep their home.
Otto collapses and is taken to the hospital, where he lists Marisol as his next of kin. After being told by a cardiologist that Otto’s heart is too big, she laughs, before going into labor, giving birth to a son. Otto gives his old car to Malcolm and takes Marisol and her kids for a drive in his new Silverado EV.
One day, Tommy notices that Otto didn’t shovel the snow on his walkway. Marisol and Tommy enter Otto’s house to find him dead, having succumbed to his enlarged heart. A funeral is held, attended by his neighbors. In a letter to Marisol, Otto says that his lawyer will give her his bank accounts, providing them with enough money to take care of her family, as well as giving his new car and his house to her.