Someone`s trying to make the students sick at the upscale boarding school, Danforth Academy! Abby, Paige, Claire and Taylor, join forces to solve the mystery. Could it be Mia or Riley - the girls who have everything that money can buy? Or Emily the know it all Principal`s daughter? Maybe it`s the wacky Sean Meneskie? Or the school`s strange Professor Plume. Whoever it is, the four best friends are going to find out!