In a city, nuclear bombs can be seen going off in the distance. The residents of a building run to the basement/bomb shelter below and get to safety. However, the bomb shelter belongs to the building's superintendent (Michael Biehn of ALIENS, THE ABYSS). He lets them stay in the cavernous area but forbids anyone to go into his private room. Days, then weeks go by, and we get to know the wide-range of characters, from a mother (Rosanna Arquette) and her daughter to two very different brothers. Things change when they think they are being rescued--but it's army guys in hazmat radiation suits who end up kidnapping just the daughter. Later, one of the guys ventures outside the shelter to discover the entrance is covered in plastic sheeting--and that the soldiers are doing experiments. He kills a few of them--and flees back inside. They weld the steel door shut so now there is really no escape. Relationships become strained, especially when they begin to develop signs of radiation poisoning. Eventually two of the guys go crazy--and become dangerous. So it's up to the more rational ones to somehow survive--but how? It's a no win situation.
THE DIVIDE is a harrowing movie, well-shot with decent acting. It never gets boring and is one of the better "Fallout Shelter" movies out there. Highly recommended. It's one of the best horror movies released in 2012.