Catherine has just plunged into an abyss of sadness. Her daughter died in a tragic accident, leaving behind for her mother the countless paintings she created as the only living memories. While Catherine attempts to mourn, a letter is left at her door. The anonymous author understands her affliction and wishes to entrust her with a heavy burden. Not to someone else. To her. Who is the author of this letter? What does he want to reveal to her? At this moment, she knows that a distant past will resurface from the depths. It is now too late. The gears are set in motion, and only the truth can stop the mechanism's course.