After months of stalking, disturbing fanmail and death threats, BigHit decides to take action against a crazed, anonymous sasaeng fan of the BTS maknae. They contact the Seoul police department for help and they send their best detective: Lee Hana As the detective with the highest solving rate in the homicide department, she isn't exactly amused to hear, that she is supposed to "babysit" a kpop idol for the next couple of weeks. Once she starts her duties though, she finds out, that the threat to Jungkook is going a lot deeper than expected.