When Dawn Rae Downton returns to Nova Scotia after two years away, she can’t find Diamond, the community after which her farmhouse is named. Diamond doesn’t exist anymore, not on the Diamond Road and not on any map. It is an ominous sign. She is home only a week when she learns that her best friend, Carol, has cancer. Carol refuses to see anyone other than Dawn Rae when the flurry of well-wishers becomes unbearable, and together the two women trace down the hundred days it takes for Carol to die.