Yoon Sung Soo, who knows about the X, wakes up. Sung Soo offers Nabi Team to bring his son if they want to know about what he knows. To earn the evidence, the Nabi Team members go around everywhere to find Sung Soo's son. Meanwhile, Moon Gi feels suspicious about Si Joon and Tae Joon's relationship. Moon Gi orders Mr. Choi to find out about Si Joon.