Two mermaids must traverse dangerous waters if they are to bridge the gap between land sea.Her forbidden love of a human leaves Calypso cursed and unable to leave her deep-water lair. Desperate to help the man she loves, she sends her best friend Luna in her place.When Luna's naivete lands her in the clutches of the town's cruel lord, she becomes a pawn in his ruthless plot to destroy the merkingdom and claim the sea for his own.Left with few choices, Calypso enlists the human she loves and the crown prince she hates, to overcome an enemy who seems to know their every weakness.While Luna fights for her life, can Calypso and the crown prince put aside their differences long enough to work together to save the day?