As `Delhi Crime 2` clocks a year since its release, acclaimed actress Shefali Shah, who played the character of DCP Vartika Chaturvedi series,  says the show is one of those projects that happen once in a while. 

`Delhi Crime 2` revolves around a violent quadruple murder, which stokes public fear and escalates New Delhi’s class divide, DCP Vartika and her team race to find the killers before they attack the city’s vulnerable senior citizens again.