In a tightly controlled salmon farm run by the sinister Utopia Enterprises, rebellious teen Leo Di-Carprio discovers the devastating truth about their home; that they actually inhabit a slaughterhouse. After a reckless stunt exposes the lie, Leo, her sister Finn, and a panicked community of salmon escape into the open ocean. Pursued by ruthless CEO Sheila Musk and her bizarre army, they team up with an eccentric cast of sea creatures to survive. As danger closes in, Leo must become the leader she never wanted to be and unite this unlikely crew to fight for freedom.