The Lock-In begins in earnest as Jentry announces she is moving back to Seoul with Moonie, unaware that Mog-Moonie is letting in the underworld's guardians. Gugu quickly travels to the school as it is transported to the underworld.
Lock-In (Jentry Chau vs. The Underworld episode) has been suggested to play 3 roles. Click below to see other actors suggested for each role, and vote for who you think would play the role best.