Have you ever dreamt of a better version of yourself? You. Only better in every way. Seriously. You've got to try this new product. It's called The Substance. It changed my life. It generates another you. A new, younger, more beautiful, more perfect, you. And there's only one rule: You share time. One week for you. One week for the new you. Seven days each. A perfect balance. Easy. Right? If you respect the balance... what could possibly go wrong? Written by Festival Cannes