As their father descends into the long good-bye of Alzheimer's Disease, two brothers discover a shocking secret about the birth of one of them, and they're not sure which one it is. The eldest brother, a Presbyterian minister, is a devout man with a calm and steady demeanor. The younger, a hard-working racehorse veterinarian, is a brash, restless, bachelor workaholic. The brothers' quest for the truth about their parentage forces them to question who they are, both as individuals and as family members. The quest asks whether blood defines family, or if the bonds forged by love and sacrifice are what truly make a person belong.