What would you buy if you happened to have 100 million dollars? perhaps a mansion, a fleet of private jets, your own personal submarine or would you put it all into a single piece of artwork? Some of the richest people in the world have done just that. But the question remains, what makes art so valuable? Enticing the superrich to splash out such crazy amounts of money. Is it love for the work, rivalry or simply just down to big business?

In this BBC film, journalist Alastair Sooke wants to find out more about this infamously secret art world and the multi millionaires who populate it. He is on mission to hunt down some of the most expensive paintings in the world to uncover the stories found behind their record breaking prices.