A little confusing story just because it lacks in explanations. Omega (Taein) is an ex prisoner, he murdered someone while protecting himself, he suffered a lot in prison for being an omega (he was abused) till he met Beomjae (alpha), a gangster, that protected him but it was not priceless. Now Taein is stuck in a toxic relationship because he owns Beomjae.
Shadow of the Reunion