Follow the smoke: Coco and her peers follow Olruggio and Luluci as they deftly ferry a wounded Qifrey to the underwater Great Hall where witches gather. To their surprise, Beldaruit of the Three Wise Ones awaits the young apprentices at the bottom of the ocean--and he's willing to offer another trial after Agott's and Richeh's was cut short. But the spells and tests of Beldaruit are as much a mystery to unfold as his past, and Coco many be the only one who can put the pieces together and close in on the startling truth.