"All I Have Is a Voice" hears from figures from across the U.S., such as a mother who lost her son in the Iraq War, the founder of a female-led anti-war organization, a Nobel Peace Prize nominee, an experienced war correspondent, war veterans and survivors, and a peace activist working across contemporary media platforms. Their touching stories and insightful experiences offer an objective picture of the effects of the U.S.' war strategy at home and overseas. The documentary also explores the actions and events that led to modern-day conflicts and the wars of the past century, analyzing the role of the U.S. in breaking and brokering peace.