Branwyn O’Tyre’s estranged brother summons her for a healing ritual. Fearing he actually plans to arrest her for witchcraft, she drinks a protection potion before he arrives. Eirik, a Viking sea captain pretending slumber in the tavern corner, witnesses Branwyn’s magic and offers her safe passage from Exeter if she will attempt to reverse a curse that plagues him. Unfortunately, every woman who touches him falls wildly but falsely in love with him. There’s only one hitch. If she fails, Branwyn’s heart will become a victim to the same madness...forever!

A premature winter and fear of a second mer attack threaten the Vikings' return to their mystical home of New Dorset. While Sven oversees the grueling task of rowing across the icy Atlantic, he is haunted by creatures of the mists. Whispering ghosts and a breathtakingly beautiful mermaid named Willow follow their longship. She claims she did not come to pick another fight with his sailors, however. What she wants this time is—him!