Modern agent Ye Qingxuan travels to the Wei Dynasty with his opponents Da Jinya and Zuo Yi because of a mysterious ring. She got involved in the prince's conspiracy to usurp the throne, and met the general Xiao Jingheng and the second prince to fight against the powerful enemy. When Golden Tooth gained the ability to travel through modern times and was discovered by the original organization X, the war rekindled. Ye Qingxuan sat in ancient times and transformed into the behind-the-scenes military adviser "Wu Jian Shadow Master", commanding Da Jinya to reverse infiltration, assassinate the leader, and finally take charge of the modern X organization. She traveled between two realms, as both an ancient princess and a queen of shadows, composing a legend of control across time and space.
