Not wanting to make Lidia upset, Mateo acts like everything is normal but places a large envelope of cash on her table before leaving and blocking her phone number so she won't be able to contact him. Mateo and Rufus then go to see Lidia, Mateo's best friend, and her baby daughter (and Mateo's goddaughter) Penny.

Mateo says goodbye to his father and leaves him a note for him to read when he wakes up telling him that he has died. Mateo agrees to meet with Rufus and explains that he wants to go to the hospital to visit to his father who has been in a coma for two weeks and Rufus agrees to go with him. Rufus flees from the funeral and goes on the run, downloading Last Friend so that he won't live out his final day alone. Rufus, Aimee, Malcolm and Tagoe, collectively known as The Plutos, hold a funeral for Rufus at his foster home but it is interrupted by Peck, who calls the police to have him arrested for attempted murder. His friends, Malcolm and Tagoe remind Rufus not to get carried away because of the news and he allows Peck to leave so that he can return to his foster home to say his goodbyes. Rufus is in the middle of beating up Peck, his ex-girlfriend Aimee's new boyfriend when he receives the call from Death-Cast. Mateo initially intends to spend his End Day in his bedroom but decides to try and push himself to truly live, reluctantly downloading Last Friend, an app developed to help lonely Deckers find someone to spend their End Day with. At midnight on September 5, Mateo receives a phone call from Death-Cast, a company that rose to prominence seven years prior and is able to predict the deaths of individuals, informing him that he is now a Decker, someone with only twenty four hours(or less) left to live.

Synopsis of they both die at the end