The novel's title comes from a conversation in Chapter 4 about the nature of Fate, where the main character expresses belief that "if one does one's best some kind angel will guide one's bark [on the river of life] past the rocks and safely into the smooth waters of the pool beyond."

The marriage was contracted for convenience: Josiah simply wants a pretty and aristocratic wife to improve his standing in society, and the Fitzgerald family are in need of Brown's financial resources.

She is thrilled to observe that at least he is receiving all the benefits she'd hoped to bring from her sacrifice: he now runs in aristocratic circles and is courting a wealthy American widow, Mrs. McBride.

Full of guilt thereafter, the two conclude they must behave themselves from now on and must no longer pursue each other romantically; they will, however, continue to be friendly to one another any time future social obligations might cause them to meet.

However, Theodora's status as a newcomer into society, and the obvious favour that Hector pays her over other eligible women who desire his hand, causes ire and jealousy to be directed her way.

Ultimately, Josiah dies; eighteen months later, Mrs. McBride (now married to Dominic Fitzgerald) throws a picnic at Versailles to which both Theodora and Hector are invited.