Dawn thinks she knows everything there is to know about dying. As a death doula, she helps her clients fix what is left undone so they can peacefully make the final transition. But when her plane plummets from the sky and she thinks she is experiencing the last moments of her life, she is shocked to find that she isn't thinking of her husband or teenage daughter - but of a road she strayed from 15 years earlier, when she turned her back on her PhD studies.  

Against all odds, Dawn survives, and the airline gives her a free ticket to wherever she needs to get to. In alternating chapters, we see possible choices: land - returning to her husband, a quantum physicist who studies the possibilities of parallel universes, she is faced with a test to her marriage and a daughter who is struggling with self-image issues. And water: returning to her studies and the archaeological site she worked on 15 years earlier, where the man she abandoned is about to make the discovery of a lifetime.  

But time may not be as straightforward as we think. As Dawn explores her possible futures, she is finding out what a well-lived life means, what we leave behind of ourselves when we leave the earth, and who she might have been....