Arvilla Cameron was abandoned by her own family. At the age of six, she already experienced working. When she turned thirteen, she met a girl named, Um Mi-sook. Ummi helped her and let her stay in their house, and eventually, they became best friends. On the other hand, Um Mi-sook already knew that there is something about Arvilla. Hence, the only way to prove her thoughts is to enroll her in Trenchant Academy. But that's a wrong move! Because of that, everything became easier for Agent O15. Mission A23-Accomplished. Taglish | Fantasy All Rights Reserved (2021) The cover photo is not mine. Credits to the rightful owner.