Audrey and Ivy are determined to bring the killer of their fellow student Lola Radcliffe to justice. Meanwhile, the girls find themselves at the center of another mystery when their friend disappears under suspicious circumstances. The only clue is a mysterious map left by the mysterious Magpie Society. With time running out and the police baffled, Audrey and Ivy must delve as far as they can into the dark secrets their school is hiding. But someone is playing a deadly game. And to win, Audrey and Ivy must change the rules...