Showing solutions, telling a feel-good story… this may be the best way to solve the ecological, economical and social crises that our countries are going through. After a special briefing for the journal Nature announcing a possible mass extinction event before the end of the 21st century, Cyril Dion and Mélanie Laurent, together with a team of four people, carry out an investigation in ten different countries to figure out what may lead to this disaster and above all how to avoid it.