Nowadays in a small town in Occitanie, Émilie, a student with an unpredictable character, decides to investigate the suspicious death of her father, following the crash of his helicopter. With the help of her three friends, she goes to explore Mount Bugarach where the accident took place and discovers a portal opening onto parallel worlds. Will Émilie be able to change the course of her destiny and save the region, threatened by a major ecological disaster?