@Randompreson
The plot starts off with Grisella Durante (the protagonist) finding out about her sister's (Ernesta) suicide . After the funeral, she takes it upon herself to investigate her sister's collage life–with the help of her two best friends—in order to try to find out why her sister may have ended it all. However, their investigation leads them to a major drug circle, where clients could get the illegal drugs they wanted for free, as long as they kept doing the challenges administered to them via a online texting app. What makes it worse is that the more Grisella and her friends look into it, the more it seems that Ereneta didn't commit suicide, but rather was murdered. Suddenly, their investigation goes from investigating Ernesta solely to figuring out the bigger picture on her involvement with illegal drug circles.