Cluster Bombs tells the story of New Zealand's central role in the global movement to ban cluster bombs and stop civilian harm caused by this weapon. Through the personal testimonies of a deminer, a diplomat, an activist, and two politicians, this film explores the humanitarian impact of cluster bombs, the fruitless efforts to tackle its use through the United Nations, and the unconventional and risky diplomatic venture that led to the creation of the 2008 Convention on Cluster Munitions. Set in the New Zealand capital of Wellington, Cluster Bombs shows how cooperation and steadfast determination can overcome barriers such as distance and size when pressing humanitarian threats present themselves.