Does anyone know this series?

A few years ago I watched a series on Amazon Prime and unfortunately I can't remember the name. I can still remember some things, but these memories are relatively vague because I was still young when I saw the series. It was about a group of teenagers, with a girl as the main character, who spend their holidays on a farm. There was no reception there because it later turns out that the farm is in some kind of parallel world. The story quickly developed into a fantasy story and I think I also remember that there was some kind of dark power that kept spreading. Maybe some of you have seen a series like that and remember the name?