Detective Kim Woo-Hyun, son of a high-ranking police officer, is drawn into a high-stakes cyber investigation that uncovers a deadly conspiracy. As he tracks the elusive hacker "Hades," Woo-Hyun discovers that Hades is his former police academy roommate, Ki Young. After Ki Young escapes custody, claiming his innocence, Woo-Hyun embarks on a perilous mission to uncover the truth. Teaming up with Detective Yoo Gang-Mi, Woo-Hyun follows a trail of deception linked to the suspicious suicide of actress Shin Hyo-Jung, whose final tweet may have been manipulated. As Woo-Hyun digs deeper, he faces a dangerous web of corruption that threatens not only his investigation but his life. To uncover the truth, he must confront the betrayal hidden within the institutions he's sworn to protect.