The Malayalam movie, translated in English as One Ocean, is the story of a middle class under-educated wife and mother who falls in a tide of emotions. Though it may seem centripetal to this woman, Deepthi; the story deals a lot with a much more array of topics, emotions, relationships and characters.
Typically, it can be referred to as a story of extra-marital relationship. But that is if you just want to see an outline of this movie. If you really understood the movie, or if you get really involved with it (I could guarantee this one), you will definitely see the different tangents of life.