Qi Jiguang lacked of an accurate sail map, so he decided to survey in person. Mao Haifeng set up a trap. He let Li Ruolan escape Liebiao Mountain with her father. Then Haifeng stalked on them and tried to uncover his secrets.
As Li Ruolan had contradictory feelings and met dilemma, Yuemin helped her gain confidence. Then Li Ruolan stayed up late for drawing the sail map and gave it to Qi Jiguang. With Li Ruolan’s help, Qi Jiguang made a plan and quickly launched a sea war.