Paul McCartney is the world's most famous musician and vegetarian. With his captivating appeal he wants to open our eyes and show us how we can join the fight against ever-increasing global warming. It all comes down to the consumption of meat. Each one of us can fight against climate change by altering his or her diet. Just one meat-free day per week would change the world: We can work it out. Passionately and with great knowledge the Ex-Beatle shows us his serious, political side.