The novel follows two main characters, Mateo Torrez and Rufus Emeterio, who both receive the dreaded call from Death-Cast informing them that they have less than 24 hours to live. Mateo is a reserved and introverted boy who has spent much of his life avoiding risks and adventures. Rufus, on the other hand, is more outgoing but carries the weight of a troubled past.As fate would have it, Mateo and Rufus connect through an app called "Last Friend," which helps people find companionship on their End Day. The two decide to spend their last day together, forging an intense and unlikely bond as they embark on a journey to experience life, love, and acceptance in their final hours. Throughout the day, they encounter various people and situations, forming deep connections and learning valuable life lessons. As they grapple with their imminent demise, they find solace in each other's company and begin to confront their fears and regrets. Despite the looming inevitability of their deaths, they try to make the most of their time together, cherishing the fleeting moments they have left. As the title suggests, the novel prepares readers for the tragic ending where Mateo and Rufus eventually face their final moments together. The story beautifully explores themes of mortality, friendship, love, and living life to the fullest, leaving readers with a profound emotional impact and a reminder of the preciousness of every moment.