She means that whenever they find out the truth they will turn against what they thought was right and become their allies. I would hope she became right. I don't actually know what this play is.
Explanation:
C. Plot. The sequence of the events in a story, novel, movie or other media is called plot.
Christian art is generally created as an expression of what the church may believe. Since there are several different types of Christianity, or branches under the large name, the church the artist goes to, or whatever religious ideas the artist has will be portrayed in his artwork. Christian art is made to support their ideas and religion, as well as give people a sort of image to look up to. After all, nobody truly knows how God looks.