Gary Gilmore, the infamous murderer immortalized by Norman Mailer in The Executioner's Song, campaigned for his own death and was executed by firing squad in 1977. Writer Mikal Gilmore is his younger brother. In Shot in the Heart, he tells the stunning story of their wildly dysfunctional family: their mother, a black sheep daughter of unforgiving Mormon farmers; their father, a drunk, thief, and con man. It was a family destroyed by a multigenerational history of child abuse, alcoholism, crime, adultery, and murder.

Mikal, burdened with the guilt of being his father's favorite and the shame of being Gary's brother, gracefully and painfully relates his story "from inside the house where murder is born... a house that, in some ways, [he has] never been able to leave." Shot in the Heart is the history of an American family inextricably tied up with violence, and the story of how the children of this family committed murder and murdered themselves in payment for a long lineage of ruin.