A rare view from within, as several of the Manhattan Project scientists, including Hans Berthe, Robert Serber, Edward Teller, Robert Wilson, and more, speak of their experiences on the path to a terrible shared destiny. As their lives and work at Los Alamos are revealed, they relate stories of contradictions and jealousies, and how each came to terms with the atomic era's most immediate consequence: the destruction of Hiroshima and Nagasaki.