Alien-world researcher Iris teaches the lonely serpent man Noctis how to court a mate, only to discover that he is a feared ancient serpent god capable of transforming into many deadly beasts. Convinced that Iris is his destined mate, he abducts and imprisons her. When Iris finally remembers how he saved her as a child—and the promise she made long ago—she realizes she may be the only one who can heal his loneliness… or become the obsession he will never let go.