45-year-old Gabrielle Chevalier was once a policeman. He was unemployed, lonely and sad, like a wandering soul who had no intention of taking care of his only daughter Juliet during puberty. One day, he happened to receive a suspicious but well-paid job: transporting a suitcase to a designated place every day, and the only rule was that it could not be opened. Daily transportation allowed him to go to strange places and meet strange people. His curiosity as a police officer is growing day by day...