Three individuals, including trainee policeman Sung-min (Lee Si-eon), job seeker Joon-hyeok (Kim Sung-cheol), and hacker Nu-ri (Heo Ga-yoon), team up to investigate a suspicious social media message that led to a woman's suicide. The investigation starts as an act of chivalry but leads to uncontrollable consequences, putting the trio in danger from SNS crime.