Assigned to study serpent-folk on an alien planet, Thea mistakenly treats Nyx, a solitary ancient Black Wyrm, as nothing more than an ordinary snake-man. In guiding him through courtship rituals, she unknowingly leads him to claim her as his mate. The truth shatters her confidence, and Thea tries to flee—only to be taken by Nyx. Their confrontation uncovers a forgotten childhood meeting, setting off a painful chain of misunderstandings before they reconcile. In the end, they welcome their hybrid child and choose each other for good.