Twisted Wonderland Book 6: The Watchman of the Underworld

After Grim attacked Briar after the SDC, she and her friends search for him, but captured by Ortho. A few days later, the school has been invaded by strong people is armor, and has captured, Riddle, Leona, Azul, Jamil, Vil, and Briar, and has Grim in tow and taken somewhere. Of course, her friends plan to rescue her and the others, but along the way, Briar regains her memories.