Bella, when she was younger, was saved by a creature of the depths when things went a little awry out in open water and spent the rest of her life following that incident seeking him out. He is not a creature of reality, however, or not a creature at all that should have ever existed: a sexy sea serpent of the dragon class of the depths.
He is glorious and the relationship between them grows and grows, unconventional but right, so very right. It may be the strangest thing in her life but she can't resist returning to him over and over again, their love taking them to passionate heights and, even too, the depths of love and lust themselves.
Passion cannot be tempered by even the ocean, after all...