Widowed history professor Thomas Bradley (Billy Zane) and his 12-year-old daughter Serena (Amber Savva) journey to an idyllic Greek island so Thomas can research ancient love spells. But once there, Serena plays matchmaker for her dad and a lovely mermaid named Neried (Kelly Brook). Meanwhile, evil fisherman Captain Mavros will stop at nothing to get his hooks into Neried's jewel-encrusted tail in this romantic family adventure.