Aquaman's underwater kingdom is facing a medical threat. Luckily, a sea witch offers him a rare plant to fight the sickness in exchange for a hefty price. But the Sea King soon discovers she isn't just greedy. The old woman has locked the true crop owner in an enchanted coral tower! What's worse, the trapped mermaid thinks she's being protected not imprisoned, so her living seaweed hair is ready to fight off any stranger who climbs inside. Can the Atlantean hero partner with the coral captive to end the witch's fishy scheme?