Joo Ah-rin sees her sister's face in a student ID photo left unattended, but she also read the replacement student section on the return log.
Joo Ah-rin wants to get her sister back, but she knows she must stop if someone is disappearing in her place.
Source stage
More discoveries
Moon Ha-rin is a dawn delivery driver and the sole witness who received a delivery completion notification for a door that does not exist on the 17th floor.
Moon Ha-rin clings to the fact that the number on her non-burning visitor pass matches the order number on her thermal bag.
Seo Ji-hoo attempts to extract the cache of a sealed group chat to revive the voices of deleted residents.
Seo Ji-hoo suspects that the Blue Line is not a power line but a deletion line that burns complaint files.
