16 year old Rens is the son of my good friend Jacqueline. It's his sole ambition to become a professional tennis player. So, when faced with the lockdown closing all training facilities, Rens hesitantly rang the bell of the biggest and most famous mansion at the Vondelpark. Villa Betty, owned by 77 year old real estate mogul Niek Sandmann. Much to the young boy's surprise the heavy gates opened unveiling Sandmann's giant garden. In it waited not only unlimited access to a private tennis court for Rens and all of his friends but also an unforeseen new friendship..