Elliot (Jeremy Allen White) is a young and energetic New Yorker. In the first 23 years of his life, Elliot has not encountered any major setbacks and has always lived a happy and free life. By chance, he met a woman named Mia (Maika Monroe), and the two collided with passionate sparks. One day, Elliot was diagnosed with a malignant tumor by a doctor and his life was not long. This sent Elliot from heaven to hell. Fortunately, in the painful treatment process, the kind and gentle Mia has been firmly accompanying and comforting him, giving him the confidence and strength to fight the disease. Gradually, Elliot learned how to coexist with his illness, but at the same time, the relationship between him and Mia was deviated.