In the perilous Mortmain Mountains, Klaus and Violet Baudelaire meet another well-read person, who helps them try to rescue Sunny from the villainous Count Olaf and his henchmen as they all near "the last safe place."

Still pursued by the evil Count Olaf, the Baudelaire orphans attempt to reach a very important VFD meeting, but first they must travel in a rattletrap submarine to the Gorgonian Grotto, a dangerous underwater cave, in search of the sugar bowl.

After the sudden death of their parents, the three Baudelaire children must depend on each other and their wits when it turns out that the distant relative who is appointed their guardian is determined to use any means necessary to get their fortune.

"In the years since this publishing house was founded, we have worked with an array of wondrous authors who have brought illuminating clarity to our bewildering world. Now, instead, we bring you Lemony Snicket. Over the course of his long and suspicious career, Mr. Snicket has investigated many things, including villainy, treachery, conspiracy, ennui, and various suspicious fires. In this book, he is investigating his own death. Poison for Breakfast...