'The Lacuna' follows the life of Harrison Shepherd, a young man shaped by his transient upbringing between the United States and Mexico. Amidst the tumult of the Mexican Revolution, he finds solace in obscurity, keeping meticulous records in his notebooks. By chance, he becomes entangled with the lives of Diego Rivera, Frida Kahlo, and Lev Trotsky, and his fate intertwines with art and political upheaval. The narrative sweeps from Mexico to World War II-era America, exploring Harrison's transformation under the care of his stenographer Violet Brown. As he oscillates between countries and identities, Shepherd encounters the 'lacuna': the chasm between truth and public perception, ultimately confronting the heart of his own story.