A snowstorm traps the students inside Eerie Elementary, and soon the school begins to freeze from the inside out. Sam uncovers that this big freeze is a living, breathing monster brought to life by mad scientist, Orson Eerie--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, Lucy, and Antonio have a new substitute teacher, who happens to be the great-great-grandson of Orson Eerie, the evil scientist whose spirit possesses and infects their elementary school--and the friends are afraid he may be trying to bring Orson back to life.

Eerie Elementary seems to be falling down around the students and teachers, so Principal Winik decides the school must be torn down, but Sam, Lucy, and Antonio suspect that somehow this is all part of Orson Eerie's evil plan to live forever--and if it is they must find a way to prevent the demolition.

"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." -- Provided by publisher.

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.

Only a week into his job as hall monitor and class protector, Sam Graves and his friends Lucy and Antonio are trying to uncover the secrets of Eerie Elementary, their living and malevolent school--and then Lucy gets eaten by her locker.