Lifeline

James and Mary have loved each other across ninety-nine lifetimes. Each time, they find one another, live, love, and die, only to repeat the cycle as different people in different parts of the world. Each life begins on the same date and never lasts past their eighty-second year. Never during their many lifetimes have they found a shred of evidence for what has been happening to them, but now, on their hundredth life together, something is different.
A mysterious entity has spoken to them, warning them to prepare for what's coming. Their next life will be unlike any before, and it could end before it begins.