A detective and a knight from an alternate world maintain law and order in a city populated by immigrants from two worlds.
A detective in the city of San-Teresa works with the Special Vice Squad in dealing with fantasy creatures from another world that have taken up residence in the city.
The duo are close to catching the man who killed Kei's partner; his plans are more sinister than they might appear.
Tilarna sets out on her own after becoming upset at the slow pace of the investigation.
Kei and Tilarna must stop Zelada from enslaving the entire city.