Aiden Williams is nothing if not ordinary. He goes to school, plays baseball, hangs out with his friends, and loves his parents. His world is thrown into chaos when his aging great-grandmother starts referring to him as "David." What's most peculiar is how insistent she is that this is his name. At first, Aiden dismisses it as another saddening example of her growing dementia. Then, while rummaging through the attic, he comes across a photo album he's never seen before. Inside, he finds photos of himself and his parents on a trip. What's strange is that he has no memory of it.

Then he discovers something even stranger. The photographs were taken three years before he was born.