Fragments of the Ark follows the exploits of runaway slave Peter Mango, his family, and a band of fellow escaped slaves as they commandeer a Confederate gunboat out of Charleston harbour and deliver it to the Union navy. Mango is made captain of this liberated vessel and commands its crew through the duration of the war. He also travels to Washington to meet President Lincoln, adding his voice to others trying to persuade the president to allow black men to enlist in the armed forces. After the war Mango bought a home from his former master and became a political organiser for voting rights. Eventually he was elected a delegate to South Carolina's state convention to rewrite its constitution.

Based on the inspirational life of Robert Smalls, Fragments of the Ark explores the American Civil War through the eyes of its most deeply wounded souls. Against this chaotic backdrop, the novel sweeps readers into Mango's heroic quest for the most basic of human rights—a safe haven to nurture a family bound by love and not fear, and the freedom to be the master of his own life.