Officers Wu Yi Fan and Huang Zi Tao are set to go undercover to investigate a potentially harmful religious sect that resides in the outskirts of Seoul. Both Officers are experienced in covert participant observation, but the risk of going native is one which is always present. Potentially more so when it comes to religious sects. Wu Fan and Tao are best friends and have been since police training school, both being the only Chinese recuits to the force. They had a sort of social solidarity