A sea serpent isn't what they thought would bring them together.

Hannah Vallens is in love with her best friend, Nicholas, and has been for years. But the magic keeping them safe aboard the pirate ship, The Siren, also keeps them barren. If her dream of having children of her own is ever to come true, she must leave The Siren-forever. And Nicholas has no plans to follow her.

Nicholas Ainsley loves his best friend, Hannah, with every fiber of his being, but there's no way she returns his feelings. In fact, he's pretty sure she's trying to get away from him with her talk of abandoning their protection as sailors aboard The Siren. But if Hannah leaves, her absence will transform The Siren from his home to a prison.

When Nicholas falls overboard and Hannah jumps to save him, the pair finds themselves stranded and adrift in the ocean. Can they put their hearts on the line, and will it even matter if their rescue doesn't arrive in time?