Staffan Hildebrand returns to Australia, where he started his project of documenting the AIDS epidemic in 1988, and to Cambodia where he first arrived in 1998. He interviews some of the scientists and activists who he met back then and displays some footage from the archive.

Helene Gayle is an AIDS expert who has been working in many different initiatives in the US, among them the Centers for Disease Control (CDC). She also works in President Obama's advisory group on HIV/AIDS. Here she talks about understanding and changing behaviors.