On the last day of school before the holidays, Hannah says goodbye to her pupils. She takes care of a few last things and tidies up, and then her holiday begins. She decides to take a road trip to Switzerland and, after a quick check of her car at the garage, she sets off.
Once in Switzerland, the car breaks down. Fortunately, Hannah is taken in by a young garage owner in a small village who repairs her car. During her stay in the village, she is told about a special coin that the young man had found and the legend that circulates in the village. Once back on the road, the story of the legend stays with her, and she decides to gather information at a museum. That innocent visit has major consequences, and so begins a cat-and-mouse game that takes her to other dimensions of time.