Dr. Kate Corrigan learns a possible location for Memnan Saa and the sad fate of Lobster Johnson's crew from its sole surviving member. Mignola at the same time gets another chance to show his affection for the Greatest Generation.
The B.P.R.D. regulars and a Special Forces unit end up at his evil Shangri-La on the Sakhan-Chinese border. They find themselves between a rock and a hard place: Memnan Saa and followers on one side, the frog/subterraneans on the other. The soldiers end up fighting with the followers - with their Yeti general - against the invaders.
The B.P.R.D. argues with Memnan Saa over the fate of Liz. There is usually one thing about each book in this series that makes them worth the price of purchase. Their philosophical argument over the fate of Liz and the course of the war, oddly for an action series, makes this one special. The agents are no more interested in a debate than the typical comic book geek. They want Liz back, period. Like true Americans, they want the upcoming war to have as few casualties as possible. Memnan tries to reason with the angry, rude Abe and the curious Kate Corrigan. He tells them his very interesting origin story. He tells them what Liz the fire starter truly is - a reincarnation of Heca-Emen-Ra, the fire bringer, the female Prometheus of Hyperborea. An entity who can, among other things, create dragons to fight frogs, just in the nick of time. Memnan doesn't want to work with the B.P.R.D. They aren't cruel enough. "What are you willing to lose to win?" Memnan is willing to sacrifice most of humanity to save the remnant. He doubts that less stern measures will have any effect.
This ends predictably. Memnan sighs over their refusal to accept his wisdom. They are get in a fight. One B.P.R.D. member - the demoralized Johann Kraus - is killed, the balloon that held his ectoplasm being popped. And, as you would expect, Liz, who all this time has been floating in a lotus position, turns on Memnan when he begins to hurt her friends, then wakes up without remembering anything. What a disappointment. It would be more interesting if she woke up changed, as Martin Gilfyrd was changed to Memnan Saa.
I will give Mignola, etc., credit for one thing. I don't know what will happen next, but I am very interested in seeing/reading it.