When everyone around her installs an app that tells them how many more years they have to live, Quinn, a young nurse, downloads the app just for her own fun. When the app tells her that she has only three days left to live before her life ends, she considers this to be false and practically impossible. However, he soon meets someone who tells him that his girlfriend died right when the app said it would happen. Quinn begins to believe that people are targeted to die because of the application, so she takes a new phone, but to her horror, the application is automatically downloaded to her new phone. In order to figure out how to change her fate before she dies and who or what is the mysterious figure who is following her, the young woman asks for the help of a friend. As time goes on and death approaches, Quinn must find a way to save her life before time runs out.