The daughter of King Neptune takes on human form to avenge the death of her young sister, who was caught in a fishing net. However, she falls in love with the king, the man she holds responsible.
Annette Kellerman
as Annette, Neptune's Daughter
William E. Shay
as King William
William Welsh
as King Neptune
Leah Baird
as Princess Olga
Mrs. Herbert Brenon
as Roador the Wolf
Edmund Mortimer
as Duke Boris
Lewis Hooper
as Count Rudolph
Mrs. Allen Walker
as The Sea Witch
Millie Liston
as Jailer's Mother
Katherine Lee
as Princess Olga As a Child
Edward Boring
as The Old Man of the Sea
