This movie is a remake of the Italian film Perfect Strangers (Perfetti sconosciuti). If you've seen that film (I personally haven't), you probably won't get a lot out of this one, because the movie is mostly story driven.

The two things that jump out the most are the aforementioned story and the cast. The story takes many twists and turns and keeps you interested all the way through without being unconvincing. This is an important aspect because almost all of the movie happens in the same house.

I said the cast was good because they felt typecasted very well. I initially decided to watch it because I love Cho Jin-woong, but even tho he played a solid role, I can't help but praise Yeom Jung-ah, who played a stellar performance.

If you like movies that make you wonder what's next, some good tension and an engaging storyline, I'd recommend a watch!