InuYasha: The Castle Beyond the Looking Glass is the second movie of the InuYasha movie series. In this film, the character designs are virtually identical to the Rumiko Takahashi versions, from the original manga (rather than using the Yoshihito Hishinuma designs, from the TV anime).The film begins with the battle between Inuyasha and Naraku, Inuyasha's biggest enemy. Together with his colleague, they finally defeat Naraku. There is a doubt whether Naraku is truly dead, however the disappearance of Miroku's Wind Tunnel and the return of Kohaku's memories are the proof that Naraku has finally been laid to rest, also Kagura's heart is in her body again. So the gang turns their efforts to their individual concerns and try to go back to normal lives. Kagome briefly returns to her time period to catch up in school and happens to be learning about the legend of Princess Kaguya. She was a maiden from the moon, found by a bamboo cutter in the forest. As suitors proposed to her, Kaguya presented to them impossible tasks before returning to the moon.
The legend was true, Kaguya is a so-called fallen angel (it is never specified if she is truly an angel, or a mere demon who thinks she is) who desires the Celestial Robe, which can make her immortal and rule the world. However, long ago Kaguya was sealed away in a mirror that seems similar to Kanna. Meanwhile, Kagura and Kanna, the two surviving incarnations of Naraku, are somewhat restless now that Naraku is dead. They come across a mirror in a hidden shrine and awaken a Celestial Maiden Kaguya, Princess of the Heavens. In exchange for freeing her, Kaguya promises to give Kagura her true heart's desire, freedom. To set the maiden free they must gather five items and drop them into the five lakes of Fuji. So Kagura and Kanna set out to recover five items that will free Kaguya from her mirror completely. The five items are the Jeweled Sprig, Crystal from the Dragon's neck, the Cloth of the Fire Rat which a half-demon wear (Inuyasha’s robe), Swallows Cowrie Shell and Stone Bowl of Buddha.Sango returned to her village to search for his brother. Kohaku has returned to Sango's village without any memory as to who he is. He was found by her sister Sango and taken to their old house. While Miroku returned to his master, Mushin, and it's presents him a task that is to be given to the surviving descendant who defeats Naraku. This is to destroy a yōkai who threatens to cast the world into eternal night, at which the first sign of the yōkai's appearance for the first time in 50 years is a full moon shining for many nights.
In this movie new character were introduced his name is Akitoki Hojo and he is the ancestor of Hojo, the boy who has a huge crush on Kagome. He is a clumsy, naive but very sweet young man. He was first seen wandering through the woods as he stumbles upon Kagome, Sango, and Shippo at a hot spring. When Shippo finds out later, however, this information is used against him. He is the keeper of a celestial robe which his family has commanded him to cast into Mount Fuji, lest it fall into a demon's hands. He joins Inuyasha's group, partly because he has a bit of a crush on Kagome and partly because he is being blackmailed by Shippo for an earlier incident.Kagura and Kanna find already find the Jeweled Sprig and Crystal from the Dragon's neck and drop it in the lake. One of the remaining item is the Cloth of the Fire Rat which was the rob of Inuyasha. When Kagome returns to InuYasha's time and the two of them, along with Shippō, go to find the remaining shards of the jewel. They get along and fight with Kagura because this evil woman wants the robe and she successfully got it. The Swallows Cowrie Shell was in the hand of Kohaku, so Kagura takes fight to him and also to Sango to get the item. Last the Stone Bowl of Buddha was in Kikyo's hand but she surrender it to Kagura without any fight and her intension was undetermined.
Kaguya finally freed from the mirror and she manage to steal the Celestial Robe to Akitoki because this will make her immortal and in order to rule the world. Along the fight in stealing the Celestial Robe, Kagome ends up getting kidnapped with the robe. To save Kagome, Inuyasha need to go to the castle of Kagura. InuYasha meets up with Miroku and Sango again and they prepare to rescue Kagome and stop Kaguya. Kaguya, whose power has increased exponentially now that she has the hagoromo, prepares to freeze time into eternal night. Kaguya tries to turn InuYasha into a full demon but his voice woke Kagome up and she attempts to stop the transformation by hugging him, saying “I love you as a half demon, InuY
asha!” and by kissing him. It was the kiss that made Kaguya's mirror cracks and returning InuYasha to his half demon form. As they battle Naraku reappears revealing that he had purposely faked his death in order to absorb Kaguya. Inuyasha manage to kill Kaguya's physical form by using his backlash wave, but it end up in the form of black cloud and attempts to absorb Kagome to gain new body. In the end she is killed by Miroku's Wind Tunnel attack. Akitoki finally throws Kaguya's hagoromo into a volcano to stop any other beings from ever using its power. However Naraku still alive and escape along with Kohaku which again back to Naraku's side because of the curse.
The movie has good twist and I really like the fact that Kagome and Inuyasha get a lot closer than ever before, I also like the bonding of Sango and Miroku too. And Shippō still manage his comedy aura that makes the story more colorful. I find out that the main essence of the movie is no other than the most powerful force in the world, “LOVE”. Although the story has no definite ending it is still very well recommended and I will not regret to watch it over and over again.