Sarah Paulson and Kiera Allen (in her acting debut) provide us with great perfomances, a very special dynamic duo that for that alone is worth watching the movie. Both are the best of the film. The script, by Aneesh Chaganty (also the director) and Sev Ohanian, is good enough to get to know and develop the two characters, find out what the problem is and reach the climax. It may be a simple story, but it is still excellent. Finally, what every thriller needs, a good scoring, is achieved in this film thanks to the talented Torin Borrowdale. Without a doubt one of the high points of the film. It's a light and exciting ride that will keep you on the edge of your seat.