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.