Jiang Li, a modern-day overworked office worker, dies suddenly from exhaustion and transmigrates into a novel as the vicious supporting female character destined for a tragic death. Bound to a sharp-tongued system, she resolves to close her heart to love, make money, and stay alive. Pei Jin, the original novel's antagonist and the General Who Guards the Nation, awakens to his own consciousness after hearing a remark she made outside the book. He falls in love with her at first sight and protects her at every turn, repeatedly risking his life to shield her from the deadly traps set by Shen Mingshu, the original heroine's unattainable beloved. Together, they expose Shen Mingshu's hypocritical true nature and unravel a mistaken identity surrounding the rescue of someone at Luoshui twenty years ago. When the final inescapable fate of the story arrives, Pei Jin bears the full backlash at the cost of his own life to send Jiang Li back to the modern world. He then transmigrates there himself, and the two reunite in the modern era, staying together for a happy ending.