Watch ratter 2015 full movie online free. Emma is a young and beautiful graduate student just starting a new life in New York City. Like most people her age, she is always connected – her phone and laptop are constant companions, documenting her most intimate moments. What she doesn’t realize is that she’s sharing her life with an uninvited and dangerous guest. A hacker is following Emma’s every move. When the voyeuristic thrill of watching her digitally isn’t enough, the situation escalates to a dangerous and terrifying level.