Coherence centres on eight friends enjoying a very grown up, suburban dinner party. A comet is passing by Earth and changes to the atmosphere are making some of them jumpy and uncomfortable. An unexplainable shattered iPhone screen is an early warning sign that something unusual is coming their way. During what seems like the longest night, their real lives, jarred by this astronomical anomaly, are confronted with multiple, alternative realities of themselves.
Full review is at http://www.nerdly.co.uk/2015/01/23/coherence-dvd-review/