THE MIDNIGHT MYSTERY CLUB The Mystery of the Locked Classroom When Mia Carter discovers a light glowing inside an abandoned classroom at Blackwood School, she expects to find nothing more than an old room filled with forgotten furniture. Instead, she finds a key marked 314-and a strange four-line symbol that seems to have been hidden there for decades. Mia, Leo, Emma, and Noah begin investigating and soon uncover the story of Clara Vale, a fourteen-year-old girl who disappeared from Blackwood in 2006. Four friends. One forgotten mystery. And a secret hidden behind a locked door. The Midnight Mystery Club has just begun.