Do-ah is a mother to a young daughter, a school counselor, and a woman standing on her own after a divorce. She faces daily challenges and violence due to her various roles. Like a numb gray rock, she protects herself but hides deep trauma within. One day, Do-ah discovers expressive arts therapy. Through this process, she begins to unravel herself, transforming from a rigid gray rock into a living, breathing boulder. Confronting her deep wounds, she embarks on a journey of true healing and growth. "Gray Rock" intricately portrays Do-ah’s emotional turmoil and her fundamental struggles as a human being. Can she live her life fully as an individual without any labels? This film conveys the profound meanings of self-discovery and healing through Do-ah’s journey.