Tempest Maguire is content with her decision to embrace her
mermaid heritage and live among her mother's clan within the
ocean's depths. Even though training to one day ascend the
throne for the aging mermaid queen is rigorous, she finds
refuge in the arms of Kona, the selkie who helped her to
find her power. But when word comes that one of her brothers
has been gravely injured on land, Tempest immediately rushes
to his side-which also brings her back to her old flame,
Mark. As a dangerous war erupts in her absence at the hands
of her old nemesis, the sea witch Tiamat, Tempest's two
loves-Kona and Mark, sea and land-will collide for the first
time, forcing her to once again choose between her heart and
destiny.