Marguerite Westley, once an awkward girl, has emerged as the only known Sironian half-breed. This young beauty discovers she is the sole link between the human world and the underwater civilization of the sirens. Clashing Waters steps into the next chapter of Margo's transformation as she continues her quest to reunite with her love, William Avery. Marguerite finds herself trapped between the fierce Obyascon and the ancient regime of Theron, who seeks to tame or destroy her. Margo's quest for freedom uncovers past mysteries, ancient prophecies, and a new love that puts her strength and devotion to the test. William stands firm in his efforts to rescue Marguerite. However, his call for help from the Legion may hasten his arranged marriage to Theron's granddaughter, Aria. William is confronted with desire, duty, and jealousy as he comes face to face with the new Obyascon Prince.