简介：What is the significance of your life?"
After receiving the SNS message, death has begun!
Trainee policeman, 'Sung-min' (Lee Si-eon) and job seeker, 'Jun-hyeok (Kim Sung-cheol)' were suspicious about a suicide incident of a girl who lived in the same dormitory, and they will be tracking her SNS account with the help of a private detective agency hacker, 'Nu-ri' (Heo Gayoon).
The investigation which started out of chivalry leads to uncontrollable consequences. These three people, Jun-hyeok, Sung-min, and Nu-ri became targets of SNS crime...