A group of archaeologists open a tomb that awakens horrible monsters, while journeyman Yusuke Godai is compelled to access a strange belt from the tomb to fight back against them.
A drunkard witnessed a murder by an Unidentified Lifeform near a Church. Meanwhile, Yusuke is bothered by the idea of fighting and is unsure if it was right until he saw the daughter of one of the slain archeologists crying, making his reason to fight "to protect the smiles of people".
Kuuga has a hard fight before Unidentified Lifeform #23, piranha -type monster Me-Biran-Gi, but with the aid of Detective Ichijo he barely escapes danger.
Recently Yusuke has noticed a shocking sensation like an electric current rippling inside his body while he fights Unidentified Lifeforms, and to solve this mystery he asks Sakurako to decipher more inscriptions.
In the face off with Unidentified Lifeform #36, praying mantis-type monster Me-Garima-Ba, Kuuga fights with the TryGoram but its knockout attack doesn't work on Me-Garima-Ba.
Yusuke as Kuuga becomes Rising Pegasus and fires an air arrow but is unable to deal the finishing blow to Unidentified Lifeform #37, owl-type monster Go-Buuro-Gu, and his transformation is undone from losing all his energy.
During a discussion between Yusuke, Ichijo and Tsubaki, they confirm that Kuuga's golden power is produced by the magical artifact inside Yusuke's body, the Amadam, in response to his intent to want to become stronger.
With the golden power of his red form, Yusuke defeats Unidentified Lifeform #39, shark-type monster Go-Gamego-Re but the media and police department emphasize that the enormous damage caused by #39's giant explosion was due to #4's independent actions.
Unidentified Lifeform #42, porcupine-type monster Go-Jaraji-Da, is given the rule to kill Midorikawa Academy's second year boy students and repeatedly murders.
Sakurako studies the letters drawn in blood that were left at the scene of Unidentified Lifeform murder cases, and tells Ichijo who has arrived in Nagano that those letters were originally of the Gurongi alphabet.
In response to the Unidentified Lifeforms who are growing stronger one after another, the combined police force feels a growing sense of danger and tasks Hikari Enokida of the Police Science Division with making countermeasures.
Through the efforts of Kuuga and the police, Unidentified Lifeform #46 Go-Gadoru-Ba is defeated. However it simultaneously means #0 will bring forth the ultimate darkness.
Unidentified Lifeform #43 Go-Zazaru-Ba continues the murder game within the city and Unidentified Lifeform #3 Zu-Gooma-Gu rampages in Chiba prefecture.
