River McIntyre has grown up down the street from Sea Planet, an infamous marine life theme park slowly going out of business in small-town Ohio. When a chance encounter with a happy, healthy queer person on the annual field trip lands River literally in the shark tank, they must admit the truth: they don't know who they are-only what they've been told to be. This sets off a wrenching journey of self-discovery, from internalized homophobia and gender dysphoria, through layers of coming out, affirmation surgery, and true freakin' love.