The plot of the Bostonians centers on the rivalry that develops between Olive Chancellor, an active feminist, and Basil Ransom, her charming and cynical cousin, when they find themselves drawn to the same radiant young woman whose talent for public speaking has won her an ardent following. 这个是正确的句子,但是我不明白,主语是Plot, 谓语呢?好像主句没有谓语啊?