Jia Qi awakens in a world eerily similar to Earth—but one where hidden Fist Masters wield superhuman martial arts, and the shadow of nuclear annihilation looms in ten years. After a mysterious transmigration and a surreal encounter with a sentient AI-like entity in a dreamlike grid dimension, he discovers he’s been reborn as Jia Ji, the infamous villain from the legendary anime Fist of the North Star. Armed with fragmented memories of the Northern Dipper Fist—a deadly, evolution-driven martial art capable of breaking all limits through battlefield adaptation—he joins a secret dojo to master its secrets before the world collapses.

As he navigates a society where martial prowess dictates power, he’s drawn into a chat group of other transmigrated warriors, each hiding their true identities and powers. With nuclear war looming and enemies closing in, Jia Ji must rise from the shadows of his past life’s infamy to become the unstoppable force the world never knew it needed—using every trick, cheat, and desperate improvisation the Northern Dipper Fist allows.