After being betrayed and cheated out of his fortune by his own cousin, Lin Ye builds a powerful fish-tracking system from scraps to take his revenge. Joining a rundown crew, he easily locks onto massive deep-sea schools, turning the tide. But as he ventures into uncharted waters, his tech picks up a signal that shouldn’t exist. In the deep ocean, he’s no longer just fishing—he’s hunting a mystery that might hunt him back.