The film "I Upgrade Alone" tells the story of more than ten years since the passage "door" that connects another dimension with the current world suddenly appeared. People called "hunters" have awakened extraordinary powers in the world. One day, after encountering a high-level double dungeon hidden in a low-level dungeon, a mysterious mission window appears in front of Mizuki Shun, who is seriously injured and on the verge of death. Subtitle language:English,Chinese