Dizi Adı: Happiness
Bölüm Adı: The Intruder
Sezon/Bölüm: 1. Sezon 7. Bölüm
Yayın Tarihi: 26 Kas. 2021

An infected person enters Building 101, and once again, Building 101 is under the threat of infection. Lieutenant Colonel Han enters the apartment complex with news to tell, but Sae Bom and Yi Hyun find him suspicious. A person goes missing due to the intrusion, and those with similar interests and minds stay close together.