Plot
Larry and Joan, an argumentative elderly couple, attend a family gender-reveal party. Joan has terminal cancer, which the couple keeps secret. At the party, Larry is shown a picture of Luke, Joan's first husband who died in the Korean War. Shortly after, Larry chokes while eating a pretzel and dies.
Upon his death, Larry finds himself on a train moving towards an unknown destination, eventually meeting his Afterlife Coordinator, Anna. She explains that he is at the "Junction", an in-between space where he must decide where he wants to spend his eternity. Each eternity has a unique "theme", but the decision to enter an eternity is final, and attempting to leave it would result in banishment to the "Void". Anna explains that Larry may wait at the Junction for a loved one or while weighing which eternity he will choose.
After several days, Joan also passes away and reunites with Larry at the Junction. She is also reunited with Luke, which prompts her to have to choose which husband she wants to spend eternity with. Joan is encouraged by her Afterlife Coordinator, Ryan, to choose Luke, who has become popular at the Junction while waiting for Joan for the past 67 years.
Because of her special circumstances, Joan is granted a special visa giving her the opportunity to sample two eternities—one with Larry and one with Luke—before making her final decision. She attends a mountain-inspired eternity with Luke, where they visit the Archives, a building in each eternity that shows moments from an individual's life. Luke and Joan watch their love story, but Luke becomes upset at a final memory, showing Larry proposing to Joan at the dock that was a significant place to Joan and Luke. While visiting a beach eternity with Larry, Larry refuses to enter the Archives to revisit their life together, feeling the Archives are too easy to lose oneself in.
Despite happy dates with both ex-husbands, Joan continues to struggle with her decision, especially when Luke shows her a letter Larry had written before her death in which he had chosen an eternity without her and would wait for her there (a plan interrupted by Joan's death), which she unfavorably compares to Luke's 67 years of devotion, waiting in the Junction. She discusses her decision with her friend Karen while visiting information booths about different eternities; meanwhile Luke and Larry bond with each other in the Junction's bar. Since souls revert to the physical age at which they were happiest, they share what made them happiest at that age and time - Luke when discussing starting a family with Joan, and Larry at a time when Joan was pregnant with their second child.
Unable to choose one of her husbands, she opts to spend her eternity instead with Karen. However, Larry realizes Joan has been wearing her hair long in the afterlife, as she had only done during her first marriage, because Joan was at her happiest when she was with Luke. Larry convinces Joan to spend eternity with Luke and ponders what he will do next. Anna tells him that she hadn't picked an eternity because she found herself happiest helping others find theirs. Over the years the passion had fallen into a mere job, and she tells Larry he had helped renew her love for helping others.
Joan and Luke happily begin their eternity in the mountains, yet as time passes, Joan becomes dissatisfied and frequents the Archives in order to relive her memories with Larry. She realizes all the little moments of life with Larry mattered more to her than the young love free of hardship and loss that she had with Luke. When Joan decides that she wants to spend eternity with Larry instead, Luke attempts to dissuade her, fearing she will be lost to the Void. They reach a closure to their relationship and mourn the life they never had together. Luke agrees to act as a decoy by having an emotional outburst, allowing Joan to pass through the Archives to find the red door that exits that eternity. She is confronted by troubled memories of her own past before finding her way back to the Junction.
In the Junction, Joan enlists the help of Ryan and Anna to hide her and find Larry. They discover that Larry remained at the Junction, taking up a bartending job (previously Luke's) and foregoing an eternity without Joan. Larry and Joan reunite and spend their eternity together in an afterlife reminiscent of their earthly life.
