Gagumber chases his daughter Memempu around town in the underground colony of Pinyin and falls for one of her traps in order to prove her worthiness to become a Marker, Memempu gets trapped herself leading to a shouting match between them.
Memempu and Gagumber get into their mark bot and are being pursued by a kaiju. Despite cutting its own cables that normally causes a kaiju to die, the kaiju continues to chase them around Pinyin.
Memempu and Gagumber have a disagreement over where to go next as Gagumber wants to stick with the familiar and established route, but Memempu wants to follow the pendant that means venturing through a dangerous route to get there.
Gagumber and Memempu are arrested for violating the rules of the labyrinth, but are given permission by Merooro, an agent with the Bureau of Regulations, to go sightseeing in Jolly-Jolly.
Gagumber is rewarded for fixing the wind machine, but gambles it all away. Memempu and Gagumber continue their journey, ending up in the colony AreYaar after eluding Zackletu.
Memempu has the dream at the destination again, this time meeting Urorop in it, as she and Gagumber are traveling with Zackletu and Yuri accompanying them
The four arrive at the colony Calacalla, where Gagumber used to live when he was partnered with Rufus, to get medical treatment for Yuri. Gagumber explains his story with Rufus at the hospital.
At the colony Manjumai, Muro leads an attack by the Shibito, an anti-Bureau terrorist group that opposes regulations. Meanwhile, as the four travel to Manjumai venturing through a hot and humid area of the Labyrinth.
With the four on board the ship, Merooro explains to them through a video how the Underworld operates and explains that the calamity called the great disaster is coming due to climate change and kaijus appearing in colonies.
Memempu and company arrive at the colony Dream after the Shibito announced that they will attack that place next. They prepare to watch an opera concert by the diva
As the Shibito cause widespread destruction in the colony, Memempu is attacked by Muro as she declares that she will kill the rainbow children before being stopped by the Boss of the Shibito.
