Contract city

The year is 2021. Sara if focused on a film career that she hopes will start at the UCLA Film School---if she gets admitted. She has set her sights on the tag WH2RR??, the graffiti tag that is appearing everywhere. Whose is it? Why is it appearing all over? What does it mean? As Sara sets out in pursuit of the elusive tag artist, her father, a retired solder turned investigator, is also looking. But if he knows what's going on he's not telling Sara.