Twilight of the Iron Giant takes the global war triggered by the giant mecha "Titan" in 2077 as the starting point. It tells the epic story of former mecha engineer Karen Walker, who after her family was killed in a mecha attack, joined forces with the anti-war organization "Freedom Front" to crack the prehistoric technology of the mechas, awaken the collective consciousness of the mechas, and ultimately prevent the invasion of the Reaper civilization and promote the signing of the "Mecha Ethics Convention." The work integrates interstellar colonial conflicts, AI ethics debates and the mysteries of prehistoric civilization. Through the birth of the "conscience algorithm", it reveals the core theme of "fear breeds destruction, trust breeds new life" and explores the eternal symbiosis between technology and human nature.