The National Gallery of London is one of the world's greatest art galleries. It is full of masterpieces, an endless resource of history, an endless source of stories. But whose stories are told? Which art has the most impact and on whom? The power of great art lies in its ability to communicate with anyone, no matter their art historical knowledge, their background, their beliefs. This film gives voice to those who work at the gallery - from cleaner to curator, security guard to director - who identify the one artwork that means the most to them and why. An assortment of people from all...