KNIFE AND KNIFE is a story that takes place in the old town of Chongqing, China. It is about high school boy Tuotuo and his grandmother. Tuotuo is enchanted by the secret of a gun of his veteran grandfather who passed away two decades ago. His grandmother suffers from Alzheimer's disease and keeps telling him war-stories of his grandfather. It's a journey for Tuotuo to explore the old people's secret and learn how to become mature.