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...