Royce's childhood was anything but calm. As an adult with famous parents, he preferred to live away from the public eye. All he needed was a boat, a crew, and his best friend Pete. That changed when Royce made a mistake that dropped him into the Gulf. Struggling for survival, his rescue isn't from above, instead it comes from the sea itself in the shape of a legend long thought extinct and relegated to stories.

Fascinated with life above the waterline, Troller happens upon a fishing boat with a lone person on deck. When the sailor falls overboard, he doesn't stop to think about the consequences of rescuing the human. When he comes face to face with Royce, he's instantly enamored, but his people haven't shown themselves in centuries. Troller swims away, afraid he's risked his people's safety, unable to forget the man he saved.

A year later, Troller uncovers the secret keeping his people below the waves. That knowledge could cost him his life. He swims to the one place he might be safe and arrives on Royce's boat, naked and exhausted. Their mutual attraction quickly becomes more as they build a life together. When their secrets threaten to separate them, will love and trust be enough to keep them together and alive?