患有阿尔茨海默症的文姬奶奶,目睹了孙女的车祸现场,为了找出肇事逃逸者,文姬努力对抗病症回忆案发细节,和儿子一同踏上了逗趣又温情的追凶之路。Set in the peaceful town of Geumsan. Bo-Mi gets into an hit-and-run accident. The witnesses of the accident are Bo-Mi's grandmother Moon-Hee and her dog Aengja, but Moon-Hee has Alzheimer's disease.