A story that began in the first issue of Hellboy concludes with the
B.P.R.D. team set to permanently wipe out the subterranean colony of
frog monsters. The team tracks down Memnan Saa's hideout, but soon find
themselves in over their heads when old enemies like the Black Flame
arrive to lay waste to the world. This is the fourth (of four) softcover
collections of the Plague of Frogs storyline each one collecting three
of the original B.P.R.D. trades.