In the waters of Bilgewater where storms and blood intersect, the roar of sea beasts is like the death knell, and the "protection fee" of the pirate king Gangplank is like a noose tightening the necks of fishermen. In this desperate place called the "Rust Sea", a unique soul struggles to survive in the cracks.
Kelvin, once a bard, is now the "Bard of the Rust Sea". In his hand is no longer an elegant lute, but a sonic device from the Zaun Abyss that shines with dangerous light. He uses life as a string, pain as a song, and uses a special rhythm that tears his throat to weave a brief and twisted illusion of "safety" in the sonar perception of the deep-diving hunter. This faint light is the only hope for countless small fishing boat owners who are struggling on the edge of bankruptcy and death.