Granny

For Jung Sookja, her grandson Gwon Yonghee is the center of her universe. Her world shatters when he falls into a coma following a brutal attack orchestrated by the notorious Black Star Mob. Despite overwhelming evidence pointing to their guilt, the criminals walk free, leaving Mrs. Jung devastated and helpless against a corrupt system that refuses to deliver justice. Her despair takes an unexpected turn when two mysterious men suddenly appear before her. They offer a startling proposition: they will train her to exact revenge on those who harmed her grandson and dismantle the mob from the inside out. Though initially hesitant, her desperation and love for Yonghee drive her to accept their offer. Under their guidance, she transforms from a grieving grandmother into a relentless force, systematically hunting down her targets one by one in a quest to bring the Black Star Mob to its knees.