Lin Xiao, a female college student with social anxiety, accidentally time-travels to the chaotic late Han dynasty and acquires the Great Han Navigation system, which can broadcast road conditions. She originally planned to ride her little donkey to avoid disaster safely, but she encounters Cao Cao at Bowangpo and is regarded by Cao's camp as an extraordinary woman capable of predicting the situation. The navigation's traffic prompts are interpreted as military early warnings, and fire alerts are treated as plans for a fire attack. At Guandu she calmly eats, at Changban road tips persuade the enemy to retreat, and at Chibi she withdraws in advance, disrupting the opponent's fire attack plan.