You haven't seen Oma in years. Your mum and dad have kept her away, scared of something that happened when you were too young to remember. But then, they changed their minds. Once a month, they say, you can visit her once a month. And now, here she is: Oma. A stranger. Your grandmother. And she has a story to tell - are you ready? After years of estrangement, a teenager goes to stay with their grandmother. Thus begins a remarkable journey of rediscovery, as each month the grandmother tells the child a new story, linked to the mysteries hidden in their past. As the months pass and the seasons change, the two build a bond that will transform both their lives forever.