Greta had just turned 8 years old when she watched the unfolding of 9/11 on her tv in Stockholm. In the following months and years she saw her fellow countryman, the diplomat Hans Blix, become a major player in the global crisis, as weapons inspector for the UN.

Now, in the 21st century of wars, political extremes and the climate catastrophes, Greta reaches out to Blix, now 94 years old, to ask if he can help her make sense of the world. Does diplomacy still have a role? Or is he the last of the great negotiators?