Unwillingly transported to the magical realm of Avalon, Gwen finds herself in the hands of its dark and beautiful ruler--the reviled Prince in Iron, Mordred. Unlike his uncle, the King Arthur of legend, Mordred is feared as a tyrant, trapping anyone with magic in an enchanted crystal prison.

When Gwen is captured after discovering her own magical talents, she strikes a deal with Mordred's enemy: if she can seduce the prince and break the crystal, they will show her how to use her magic to return home.

Mordred shows a strange gentleness to Gwen. He allows her to join his court, treating her as a treasured guest. And despite promising each day to imprison her in the crystal, he only draws her closer, fanning the flames of desire between them into an inferno. But how long will his love last when he discovers her betrayal?