SPOILER ALERT: the following article contains massive spoilers, including the ending. If you have not yet seen the movie, proceed at your own risk, or better, come back to this article later!
SPOILERS AHEAD
A Banquet Plot Summary and Synopsis
Widowed mother Holly is radically tested when her teenage daughter Betsey experiences a profound enlightenment and insists that her body is no longer her own, but in service to a higher power. Bound to her newfound faith Betsey refuses to eat, but loses no weight. In an agonising dilemma torn between love and fear, Holly is forced to confront the boundaries of her own beliefs.
Source: Wikipedia (CC BY-SA 3.0).