Himeno Awayuki is trying to find a way to fit into her new life. When her widowed father, marries the richest woman in the world, Himeno goes from rags to riches overnight. But life is never that easy, as she feels unwanted and unnoticed, especially by her two bratty stepsisters.
Himeno has decided to accept her destiny, but she's going to need a lot more training if she's really going to be a Pretear. She's far too inexperienced with combat for Hayate's liking, a fact that pits the two against one another in a battle of insults. Luckily, Sasame is a little more understanding, and willing to teach her the tricks of the trade.
The training continues, and while Himeno seems to have made a great deal of progress, Hayate still isn't convinced of her skills, and puts her through another series of tests that she ultimately fails. But, it seems that he may very well have more confidence that he will reveal, but another demon attack is going to put any sort of praise on the back burner.
Kei has been working on a program to predict where the demons will strike, and it seems that the next probably location is Himeno's home. Determined to stop it, Hajime, Mannen, and Shin run off to try and locate the demon, and Himeno is right there for the quest. Unfortunately, so is the family butler, Mr. Tanaka, who is more than willing to help, and introduces the group to some of the houses more interesting sides.
Himeno has been having nightmares about the Princess of Destruction, and after Hayate finds out, he decides that it's his duty to guard her. The other Knights won't have any of that however, not without being able to protect her as well. But, Himeno's dreams become a reality when a demon larva arrives.
Himeno tries to focus harder to become more beneficial to the Leafe Knights cause, but what she really wants to know is who the Princess of Destruction is, and she convinces the kids to take her to their homeland of Leafenia. While they try and keep it a secret from the others, they unfortunately get caught, but scolding will have to wait when another larva attacks.
Hayate finally gives Himeno the details on who the Princess of Destruction came into existence in the first. The Leafe Knights also search for the lone demon larva that escaped after the last battle, but their efforts are in vein as it is merely a trap set by the Princess to lure Himeno to her and break down her confidence.
Himeno has lost her ability to Prét, although it could simply be the fact of having discovered the truth about who the Princess of Drestruction really is. As a result, she isolates herself from the Leafe Knights for a short time to sort through her emotions, but finds some emotional support from a very unlikely source: Mawata.
Still unable to find the strength to protect anyone, Himeno continues to find the power within herself. Meanwhile, another demon is lurking about the Awayuki residence, but Karou thinks perhaps its a ghost and enlists (forces) everyone to help him track it down. The Princess of Destruction however revels that she is much closer than anyone thought, and it seems that one of the Leafe Knights is still in love with her and willing to anything in order to be by her side.
Sasame has confessed his love for Takako, and she is more than happy to take him by her side as her very own Dark Knight. Himeno might have finally found the power to become the Prétear once again, but this tragic turn of events is slowly taking its toll on the Knights, and things get much worse when Takako comes to Leafenia with her new Knight by her side
Sasame has changed sides, and Takako has yet another plan to drain Leafe from the world. Knowing the misery and sadness that Mawata feels, she imprisons her within the Tree of Fenrir to use as a conduit to collect the precious energy. Himeno's family tries to free Mawata from her encasement while Hayate goes to face Sasame alone.
The battle rages on, and although Hayate has been bested by Sasame, by Himeno is determined to prét in order to defeat the Princess of Disaster. It's going to take the power of all of the knights, but the real turning point is Mawata finally coming to her senses and realizing that she's not nearly as alone as she thought.
Takako finally reverts back to her normal self, but the danger created by the tree still looms. Himeno manages to achieve the ultimate Prétear form, but it's going to lead to the ultimate sacrifice.
