Humanity invents a way of traveling at near light speed by encoding people as energy and reconstituting them at the destination. So one traveler sneaks an engagement ring onto his body when he is scanned, because his ex-wife will also be one of the people sent to the stars. I didn't understand why, but the original encoded group is then sent on to further destinations, giving the main character even more chances at a do-over.

The story does understand just how wrong-headed the attempt at a do-over is.