Leonard Churchill wouldn't be surprised at all if human detectives easily exposed the location of the Mother Bug—had that been the case, the [Ominous Matron Maggot Margit] would have been annihilated by the top-rank card masters of Saint Crown City long ago.
Leonard Churchill sniffed the air, discerning the direction without any hesitation, and once again dashed toward the depths of the burrow.
...
Meanwhile.
On the other side, the battle with the main force was still raging.
The team of human adventurers was trapped in a huge cave by the insects.
Insect swarms filled the tunnels from all sides; there was absolutely no escape.
The insects' attack was a tactical siege; it's more accurate to say they were herded here rather than escaped.
At this moment, less than twenty of the two-hundred-person team, including Non-Player Characters, were still alive.