Barbara Thorson is a misunderstood and troubled young girl who escapes her difficult reality by immersing herself in a fantasy world where she battles giants threatening her quiet coastal town. Armed with a powerful warhammer named Coveleski, she believes it is her duty to protect everyone from these fearsome creatures. Barbara's intensity and eccentric behavior isolate her at school and worry her older sister Karen, who struggles to manage their household after the departure of their parents. With little support, Barbara finds solace and purpose in her fantastical missions, making her increasingly detached from the real world.

New student Sophia befriends Barbara, and school psychologist Mrs. Mollé takes an interest in her well-being, trying to understand the root of her distress. Despite Sophia's attempts to connect with her, Barbara remains fiercely determined to uphold her dangerous escapades. Through challenges and confrontations, Barbara's intricate world begins to intertwine with reality, revealing deeper truths about her fears and the personal struggles that fuel her imagination. As the lines between fantasy and reality blur, Barbara is forced to face the true source of her inner turmoil.