Intrigued, his grandson Cannon Hersey visited present-day Hiroshima to trace his grandfather's footsteps as he worked to understand his grandfather's feelings when he was writing the book. He uncovers information that gives a fresh perspective of the situation at the time. And through the people he meets in Hiroshima, Cannon sees what the scarred Japanese city is like today.
Wishing to unravel the reasons his grandfather never spoke about Hiroshima later in his life, Hersey's grandson Cannon Hersey, an artist, visits Hiroshima. Meeting people involved in the telling of "Hiroshima" and other victims, Cannon searches for the secrets his grandfather had locked in his heart, shares memories of the tragedy, and considers the significance of telling these stories.