Sam Graves discovers that his elementary school is alive and plotting against the students, and,as hall monitor, it is his job to protect them--but he will need some help from his friends.

A heavy snowstorm traps the students inside Eerie Elementary, a living, breathing monster brought to life by mad scientist, Orson Eerie--soon the school begins to freeze from the inside out, and Sam, Lucy and Antonio must find a way to get the heat back on before all the students freeze to death, while facing the truth that Orson Eerie is even more powerful and dangerous than they realized.

Sam is working on making a clay dinosaur for the school art show and sale when the clay suddenly comes to life and attacks him, a sure sign that once again Orson Eerie, whose spirit inhabits the school, is up to something--and it is up to Sam, Antonio, and Lucy, to discover how a self-portrait of Orson figures into his evil plan.

For the first time in years Eerie Elementary is planning a science fair, which may not be a good idea in a school which is alive and out to get the students. But when Sam and his friends find a book of experiments that contains all of Orson Eerie's notes, it may turn out to be the key they need to finally understand the mad scientist.