Takeru Shiba, the 18th head of the Shiba Clan, must gather together his four retainers to become Shinkenger to face against the return of the Gedoushu and their leader, Dokoku Chimatsuri.
Takeru's new retainers show difficulties in adjusting to their new lives as Shinkenger as another Ayakashi attack forces them to learn the rules of their master.
Tired of both training and Takeru, Chiaki decides to return to his former life, only to discover the burden he bares in what he must do as a samurai when targeted by an Ayakashi.
As the other Shinkenger relax, Takeru trains in increasing his Mojikara in order to use a beetle-themed Secret Disk, which becomes necessary against an Ayakashi their swords can't cut.
Ryunosuke is sent to catch the Marlin Origami living in the wild, where he must work with a jaded fisherman to save his team from a poisonous Ayakashi.
Chiaki and Hikoma reach their breaking point and must come to a new understanding after Shinken Green is passed over to assist in creating Daitenkuu, a new Origami formation.
The Shinkenger learn the truth regarding Doukoku's previous defeat and his hatred for the Shiba Clan as he sends out his most powerful Ayakashi while both are intercepted by the eye of Juzo Fuwa.
After his failures against Ushirobushi, Takeru leaves the mansion to wander, forcing him to rediscover the connection between himself and his retainers.
Takeru finds himself under attack by a mysterious power that sneaked into the mansion, while the retainers investigate a strangely suspicious sushi salesman who also broke in.
Genta approaches Takeru about being his 6th Shinkenger, but an initial rejection forces him and the retainers to figure out the true reason why the Shiba lord doesn't want his friend involved.
The Shinkenger must figure out a way to save the life of Kotoha and many others when a soul-stealing Ayakashi attacks and chooses to hide until their mortal lives end.
In the midst of other problems, Chiaki must save Mako and others from a hostage crisis as Shinken Pink discovers more about his personal style through Chiaki's father.
With the sudden increase in Gedoushu power, the Shinkenger head to Tengen Temple to obtain a sealed case which may assist them, while Shitari attempts to find out the sealing character that stopped Doukoku in the past.
With the Shinkenger down, Takeru abducted by Juzo and Gozunagumo strengthened by Doukoku's punishment, all hope lies in Genta for completing the Inroumaru and giving the team a new trump card.
Takeru is forced into having a showdown with Juzo Fuwa, but Ryunosuke stands alone in trying to stop his lord from going through with this selfish decision.
When an emissary of a powerful Ayakashi switches the bodies of the Shinkenger with inanimate objects, Chiaki and Kotoha must figure out their own strategy for stopping it.
Having gained a sushi phobia from becoming it, the Shinkenger help Genta try to get over it while Akumaro heads forth into battle to prove his power to Doukoku.
With the Ushi Origami running amuck and Hiro trapped inside, the Shinkenger must work with his grandfather to figure a way to stop the rampage and prevent Happouzu from taking control of it for Akumaro.
When Genta starts losing customers to nearby curry restaurants, he decides that the only way to beat them is to join them all the while the Ayakashi Sogizarai attacks.
When Kotoha receives a letter from her sister, she must decide if she should go back home or continue being a Shinkenger as the Ayakashi Sunasusuri attacks.
During a New Years celebration, the arrival of a special Kuroko and a fire-manipulating Ayakashi forces Takeru into a battle where his greatest secret is finally revealed.
As Kaoru takes her place as the true Shiba Clan head, Takeru is forced to figure out where to go next while his former retainers are forced to adapt to their new leader.
With no other purpose left, Takeru begins his climactic showdown with Juzo, while Hikoma tries to find him to remind him of the bonds he still possesses.
Takeru completes his final showdown with Juzo Fuwa while finally confronting his retainers about the deception as Dayu prepares the final step for Dokoku's return.
As Dokoku returns with Dayu's sacrifice, Kaoru and the retainers desperately attempt to seal him once and for all while Takeru becomes involved in a stunning move by the Shiba head.
With the Sanzu River overflowing and Gedoshu rampaging through the human world, Takeru, his five retainers and allies must work together and use everything to finally put a stop to Dokoku and restore peace once again.
