Two young British women, Jane and Cathy, embark on a cycling holiday through the scenic but sparsely populated countryside of France. As they cycle through the rural landscape, they find themselves enjoying the tranquility of their surroundings. Tensions arise between the friends after a disagreement about how to spend their day. Jane prefers to stick to their planned route, while Cathy is more interested in taking breaks and exploring. They decide to part ways temporarily, with Jane continuing on while Cathy stays behind to relax by a secluded spot.

As Jane cycles ahead, she becomes increasingly uneasy about leaving her friend alone. Returning to the spot where they separated, she finds no trace of Cathy and starts investigating her sudden disappearance. Jane's search leads her through a maze of village intrigue, encountering suspicious locals and unhelpful authorities. The mystery deepens as Jane uncovers unsettling clues about Cathy's fate, pushing her into a desperate quest for answers. Evil might be lurking closer than she realizes, and time is running out.