Jack recruits Katnappe, confident that she will be the one to finally take down the Xiaolin Warriors. Using the Golden Tiger Claws, Katnappe goes untouched against her foes and constantly outsmarts them. However, she also misuses them by pilfering from numerous places for her own pleasure. Omi and the rest start to get frustrated, and begin to stragetize on how they'll be able to stop this ""cat burglar"".

After Katnappé releases Wuya from the puzzle box, the two form an unhealthy alliance. Jack builds another robot, but this time, it's a clone of himself, who is much quicker, smarter, and gets all the good jokes. Jack and his clone use the newest Shen-Gong-Wu, Shard of Lightning, to freeze time and quickly steal most of the Warriors' Shen-Gong-Wu. The Warriors must think of a plan to stop them, while Wuya starts to regret teaming up with Katnappé.

After Kimiko accidentally breaks the Mosaic Scale, she hides the pieces in Clay's room. The next day, Clay starts acting weird ... and acting up. It turns out that the Mosaic Scale was used to contain a mischievous spirit named Sabeeny, an earwig who has possessed the Dragon of Earth. If Sabeeny finds the Monarch Wings, the sister Shen-Gong-Wu to the Scale, and combines them with the Mosaic Scale, it will no longer need a host! The earwig will become invincible! Can the Warriors stop Sabeeny?