Laure de Lestrade, a radiantly beautiful young woman, harbours a painfully tragic secret -- 15 years ago, her mother vanished one night without leaving a trace, in never-explained circumstances. One day, close to her mother’s house, Laure discovers a crowd gathered on the roadside: a fascinating crop circle has appeared in the field : stalks of corn have bent to form this geometrical shape, several yards long… Laure learns that a similar phenomenon has happened on the very day of her mother’s disappearance ! Laure is challenged to get to the heart of the mystery of this threatening phenomenon and the secrets of her past.