Katie Johnson was no ordinary kid. She was a ninja. Katie's mother always said that their ancestors were ninjas who protect the world from danger. Hearing this, Katie set out to be a ninja herself. She had to take to intense training from her mother. Every day, her training got harder. Finally, she had completed her training. On the way, Katie still needed to learn Math and all so now she had to her ninja identity a secret. By day, she studied. By night, she fights crime. 

On her first night, she defeated Wolfman, a evil half - wolf and half - man villain. One day, she saw Wolfman walking through the streets. "Weird" thought Katie. Katie decided to spy on him. Bad Move! Wolfman knew that Katie would come to spy on him and he set up a trap. "With you out of the way, I'll be able to take over the world!" cackled Wolfman. "That is not happening"! cried Ninja. "And just how will you stop me"? Wolfman didn't wait for an answer. He went off, cackling.

Meanwhile, Katie had used her trusty scissors to cut the rope and followed Wolfman. She called the cops to take Wolfman. But Wolfman escaped. Ninja wouldn't let that happen. If Wolfman was free, then the world would be in great danger. Ninja jumped on one tree and followed Wolfman to his lair. She tried to catch Wolfman, but he slyly led her to a trap door. But Ninja held Wolfman's leg and pulled him down the trap door. She got out some rope and pulled herself up and left Wolfman.