Sarah Shannon is a genius with no solution to the problem that matters: her wife Rhona is dying. The awful trudge of mortality is wearing everyone down. While Sarah and Rhona still love each other desperately, Sarah has found refuge in her work, and her colleague Akshai. Sarah, an Information specialist, has been running simulations on black holes. But the equations have changed. They have responded. Sarah has made a breakthrough, or perhaps, a breakthrough is remaking her.