King Louis XIV's quest for immortality leads him to capture and steal a mermaid's life force, a move that is further complicated by his illegitimate daughter's discovery of the creature.King Louis XIV's quest for immortality leads him to capture and steal a mermaid's life force, a move that is further complicated by his illegitimate daughter's discovery of the creature.King Louis XIV's quest for immortality leads him to capture and steal a mermaid's life force, a move that is further complicated by his illegitimate daughter's discovery of the creature.