At dinner that night he was surprised to see Kostya come into the Great Hall. She stood scanning the rows of faces until she saw him. Then she motioned for him to come. Tamblin snuck a peek at the Hufflepuff table but Cascata was ignorant of, or deliberately ignoring, the situation. Tamblin took it as sign and quickly left to follow Kostya out into the hall.
The Durmstrang girl didn't bother to say anything but immediately started walking toward the massive doors that lead outside.