Kagami Arata, member of ZECT, meets Tendou Souji, who has been training his entire life waiting for the Kabuto Zecter. As a Worm attacks a young girl, Kagami attempts to call the Kabuto Zecter but it flies to the hands of the strange man, Tendou Souji.

Tendou uses the second form of Kabuto, known as "Rider Form" by using a process called "Cast Off". Kagami tries to understand Tendou and why he believes he is destined to be great.

A woman named Yuki is attacked by the Lanpyris Worm and impersonated, but she survives so now there are two Yukis running around. More intrigue between Tendo & Kagami, who is quickly falling out of favor with ZECT, plus a fight between Kabuto and a new kind of Worm at an amusement park.

Kagami must face the tough truth about the person his younger brother really is. Tendou confronts Kagami and tells him that he will defeat all Worms, including Kagami's brother, Bellcricetus Worm. In the end, Kagami is left with the toughest choice of his life.

The connection between Hiyori and Tendou is seemingly discovered as Tendou makes a promise to Hiyori that he might have to break after ZECT discovers the identity of Kabuto.

Tendou plans his escape from ZECT with the help of Kagami. After escaping, Kagami is sent to meet Hiyori and Tendou must defeat two Worm that are impersonating ZECT members.

Sou Yaguruma, also known as Kamen Rider TheBee, arrives from ZECT HQ with his own ZECT Tropper team known as Shadow. Kagami warns Tendou to stay out of ZECT affairs now that a new Kamen Rider is here. After saving a wedding and fighting a pair of Worm, TheBee then asks Kabuto about joining them and ZECT, but Kabuto refuses, resulting in a showdown between the Riders.

Due to being upstaged by Tendou, Yaguruma loses his cool and begins trying to defeat Kabuto once and for all. After seemingly destroying the Zect Belt, Hiyori remembers more about her past and the boy that had a rider belt.

Yaguruma discovers that Tendou is alive and well, and so is the Zect Belt. Furious, he and Tendou fight once again, but this time, Yaguruma goes insane and injures his fellow comrades in the process. Ideals lost, the TheBee Zecter leaves him for Kagami Arata.

Kagami basks in the power of the TheBee Zecter and the new position of Shadow's captain. However, his mission is to defeat Kabuto and after fighting him, Kagami realizes that there is something far more important to him than being a Rider. After this, he gives up the TheBee Zecter along with the title of Kamen Rider TheBee.

No tenemos una sinopsis en español. Ayúdamos a ampliar nuestra base de datos añadiendo una.

No tenemos una sinopsis en español. Ayúdamos a ampliar nuestra base de datos añadiendo una.

No tenemos una sinopsis en español. Ayúdamos a ampliar nuestra base de datos añadiendo una.

No tenemos una sinopsis en español. Ayúdamos a ampliar nuestra base de datos añadiendo una.

No tenemos una sinopsis en español. Ayúdamos a ampliar nuestra base de datos añadiendo una.

No tenemos una sinopsis en español. Ayúdamos a ampliar nuestra base de datos añadiendo una.

No tenemos una sinopsis en español. Ayúdamos a ampliar nuestra base de datos añadiendo una.

No tenemos una sinopsis en español. Ayúdamos a ampliar nuestra base de datos añadiendo una.

No tenemos una sinopsis en español. Ayúdamos a ampliar nuestra base de datos añadiendo una.

No tenemos una sinopsis en español. Ayúdamos a ampliar nuestra base de datos añadiendo una.

No tenemos una sinopsis en español. Ayúdamos a ampliar nuestra base de datos añadiendo una.

No tenemos una sinopsis en español. Ayúdamos a ampliar nuestra base de datos añadiendo una.

No tenemos una sinopsis en español. Ayúdamos a ampliar nuestra base de datos añadiendo una.

No tenemos una sinopsis en español. Ayúdamos a ampliar nuestra base de datos añadiendo una.

No tenemos una sinopsis en español. Ayúdamos a ampliar nuestra base de datos añadiendo una.

No tenemos una sinopsis en español. Ayúdamos a ampliar nuestra base de datos añadiendo una.

No tenemos una sinopsis en español. Ayúdamos a ampliar nuestra base de datos añadiendo una.

No tenemos una sinopsis en español. Ayúdamos a ampliar nuestra base de datos añadiendo una.

No tenemos una sinopsis en español. Ayúdamos a ampliar nuestra base de datos añadiendo una.

No tenemos una sinopsis en español. Ayúdamos a ampliar nuestra base de datos añadiendo una.

No tenemos una sinopsis en español. Ayúdamos a ampliar nuestra base de datos añadiendo una.

No tenemos una sinopsis en español. Ayúdamos a ampliar nuestra base de datos añadiendo una.

No tenemos una sinopsis en español. Ayúdamos a ampliar nuestra base de datos añadiendo una.

No tenemos una sinopsis en español. Ayúdamos a ampliar nuestra base de datos añadiendo una.

No tenemos una sinopsis en español. Ayúdamos a ampliar nuestra base de datos añadiendo una.

No tenemos una sinopsis en español. Ayúdamos a ampliar nuestra base de datos añadiendo una.

No tenemos una sinopsis en español. Ayúdamos a ampliar nuestra base de datos añadiendo una.

No tenemos una sinopsis en español. Ayúdamos a ampliar nuestra base de datos añadiendo una.

No tenemos una sinopsis en español. Ayúdamos a ampliar nuestra base de datos añadiendo una.

No tenemos una sinopsis en español. Ayúdamos a ampliar nuestra base de datos añadiendo una.

No tenemos una sinopsis en español. Ayúdamos a ampliar nuestra base de datos añadiendo una.

No tenemos una sinopsis en español. Ayúdamos a ampliar nuestra base de datos añadiendo una.

No tenemos una sinopsis en español. Ayúdamos a ampliar nuestra base de datos añadiendo una.

No tenemos una sinopsis en español. Ayúdamos a ampliar nuestra base de datos añadiendo una.

The Worm Souji returns to the real world to destroy everyone and everything, including Hiyori. Tsurugi and Misaki prepare for their first date, but while on their date, Tsurugi becomes Scorpio Worm. Tendou and Kagami prepare themselves for the approaching battle with Dark Kabuto.

Kamishiro Tsurugi finally becomes aware that he is Scorpio Worm. Driven to a point of insanity, he takes Kagami captive and demands that all the Zecters be given to him. Tendou then goes to make the trade, but ultimately defeats Scorpio Worm.

Riku Kagami has finally announced to the world the threat of the Worms, and in turn ZECT has created necklaces that react when a Worm is nearby. However, Tendou seems to be destroying these necklaces, but will not tell anyone the reason. In an attempt to block Tadokoro's bullets, Tendou accidentally injures Renge.

After confronting Tendou about the truth of the Worm necklaces, Kagami doesn't believe that they actually turn humans into Natives. Tendou and Kagami once again fight, with Kagami being the victor. Meanwhile, Mishima is plotting with Negishi to overthrow Riku as the leader of ZECT. Yaguruma is forced to kill Kageyama after he turns into a Native, due to the necklaces.

Kagami rushes to stop Mishima's plans of using a meteorite to drain Dark Kabuto of his powers. As he reaches the area of the final battle, he finds Mishima and Negishi conducting a broadcast all around the planet. Unbeknown to the humans, the signals sent out by the broadcast are composed of Dark Kabuto's drained power and causing the humans to become Natives. As Kagami lays defeated, Tendou appears, after going one-on-one with Mishima, Kagami regains his strength and joins Tendou in a double team on Mishima for the final battle.