Twenty-four-year-old Summer Johnson knows two things. The first is that due to a quickly worsening medical condition, she faces a risky surgery in three months' time that may or may not end in her death. The second is that she would like to fall in love before then.

As spring sinks into her namesake season on the Florida coastline, Summer plays the odds and downloads a new dating app—and after one intriguing message from a beautiful surfer named Cooper Nichols, it becomes clear that the story of what may be her last few months under the sun is about to be completely revised. All she has to do now is write something worth reading.