More Than One Door

Every door keeps a record. Some records keep a name. Kang Iyeon is a door-lock technician who trusts procedure more than people. Then an emergency call sends her into an apartment that should be empty, where she opens a door that does not exist-and the authorization is logged under her own account. As missing residents, borrowed voices, and impossible access records multiply across Haeon City, Iyeon discovers that the locks are not malfunctioning.
Someone has built a business around giving the wrong thing permission to enter. To clear her name, she must follow the trail through sealed apartments, abandoned service centers, and a security company whose system can turn any boundary into an entrance. But every attempt to revoke access creates a new user, and every door she closes teaches the presence inside another way through. A contemporary Korean occult techno-thriller about identity, consent, and the systems we trust to keep the outside out.