Agerna is a planet rich in Vizorium, the one mineral necessary to space travel. So when a series of mysterious attacks on mining operations has the governments of the world pointing fingers and blaming each other, the World Welfare & Works Association naturally sends in their top agents to investigate. But are the lovely angels up to the task of stopping a mad scientist bent on taking a long dormant alien race to its final evolutionary form? Throw in a thief who's hunting a bottle of World War II-vintage wine and it's a safe bet that nobody on the planet is safe. It's more chaos, more mayhem and even more destruction than ever before as the Dirty Pair take on their wildest case yet!

The Dirty Pair are travelling to the planet of Ookbar in search of a missing girl. Kei and Yuri have traced Missinie to the forest of Nolandia, but their investigations have stalled thanks to the less-than-helpful Chief of Security. But the Dirty Pair have never let a little bureaucracy stand in their way.

Recap episode of Seikaisuru Kado, also known as Episode 12.5.

The "Otherworld" is a vast and dangerous realm hidden from the knowledge of the common folk. It is also home to many creatures that threaten any human who dare visit it. To witness its desolate yet oddly absorbing environment, one must search for portals that could reside anywhere, from secret elevators to shrine entrances. After a fateful encounter with a horrendous Otherworld denizen, Sorao Kamikoshi ponders whether to keep going or give up in life. Meanwhile, Toriko Nishina scours the Otherworld in hopes of finding her friend Satsuki, who she believes is lost somewhere within the realm. When the two cross paths, friendship blossoms. In order to acquire as much information about this obscure dimension, the two travel back and forth from the real world to the other. Sorao and Toriko's bodies are soon influenced by the Otherworld, preparing them for the many horrors to come as both of them try to fulfill their goals.