Flint Larson has known when he was going to die since he was eight because of the Half-Life Institute, and he is spending the last forty-one days quietly with his divorced parents; September is a vibrant aspiring scientist who wants to cure "half-life", especially since she has met Flint--but their time together is getting short.

A philosophical conversation about death from the author of I Give You My Heart. "Are you going to die, Grandpa?" "Someday, sweetheart. But I hope not too soon." Their simple exchange covers a lot of philosophical ground. Grandpa allows that "no one really knows" what happens after death, but he tells Christopher that some people think of heaven ("a place without sadness or war"), others of rebirth ("each time, you get wiser"), and others of "nothing"...