Feared across every ocean, the pirate crew Stray Kids rule the seas with chaos and unmatched strength. But when a violent storm leads them to a mysterious girl trapped in their nets, they quickly realize she's no ordinary catch—she's a mermaid with a haunting voice and a past tied to the ocean's darkest legends. As enemies close in and the sea itself begins to turn against them, the crew must decide: use her power... or protect her from a fate worse than death. Because the deeper they sail, the more they realize-some songs aren't meant to be heard... and some tides were never meant to rise.