The afterlife. It is humanity's greatest mystery, only to be revealed eventually through the portal known as death. At least, that's how it's supposed to work.Sophie Caldwell is fulfilling her dream of interning at the art museum in Geneva, Switzerland when she meets Alie Quin, an elite member of the British Special Forces. Their attraction to one another was unexpected and unintended, but also undeniable. Just as their lives begin to intertwine, a supernatural catastrophe thrusts them into a hellish existence where they will have to fight, side-by-side, for their very souls.