France votes for a new president in a few weeks, and far right candidate Marine Le Pen has her sights set on victory. She is trying to detoxify her party to distance herself from its racist and anti-Semitic past. However, Gabriel Gatehouse explores how the Front National's desperate need for money could be undermining this process. He meets fixers and insiders who have helped Marine Le Pen run her campaign and raise money from some controversial sources around the world.