Marmi is a simple marmot who lives in the Tristaina valley. What she likes best is chatting with her friends, taking siestas by the lake in the middle of the valley and eating cannelloni made with leaves and wild blackberries. One day while out for a walk, Marmi comes across what she thinks is a pretty metal hat... but really it's a can that someone has dropped. A funny story that helps young children reflect on the danger of dropping litter in the mountains and the importance of respecting nature.