The premise of the story is Casey is from a well-to-do family and her mother does not approve of her being a lesbian. Consequently, Mom refuses to meet her partner Alex. The movie takes place over Christmas, so there is a visitor, Carmen, who adds interest, as well as interesting goings on from Casey's brothers.
This is the sort of movie I would be apt to watch over and over, just for the feeling of belonging and comfort that Casey and Alex have. I also like the water, and the seaside landscapes.