In the not too distant future, Sage Washington wakes up to find herself in a sort of hospital room with no memory of how she got there or why. Memories slowly return with the help of friends and her doctor, but the change in her is unmistakable. She is the first person to transition to 'the singularity', human consciousness in a robotic body that looks like her when she was twenty. She discovers the many things she couldn't do before and also those she has come to expect that aren't there anymore. As Sage comes to terms with the fact that she has only thirty days to decide whether to remain an immortal, who may never die or return to her biological body, which has a terminal disease, she finds the decision is harder than she ever imagined.