Seo Ji-hoo, a part-time CCTV inspector, can restore the video gaps where a black resident card was swiped.
Seo Ji-hoo is cooperative with Min Seo-ryeong, but he does not easily voice dangerous suggestions like swiping the card one more time.
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.
Joo Ah-rin is a transfer student who arrived after her older sister disappeared. She strives not to miss her sister's roll call response from behind the white door.
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.
