At the D-Rank raid, Jinwoo is reunited with four of the Cartenon Temple survivors. Together, they explore the dungeon with Kang Taeshik and his men. After splitting up, they hear a scream, and then...
If you find the boss chamber, 
send someone to let us know.
.أرسلوا أحدًا لإعلامنا إن وجدتم غرفة الزعيم
Solltet ihr auf den Boss-Raum stoßen,
gebt mir sofort Bescheid.
Si vous tombez sur le boss,
venez m’avertir immédiatement.
Se doveste trovare la stanza del boss,
Найдёте комнату босса — сообщите.