Not only is Tae-in from the streets, but he is also labeled as a passionate omega ex-convict. Until now, his world has been a passive life centered around the gangsters and criminals he met in prison. Then one day, Tae-in happens to be a witness to a murder case and meets Dan-woo, the prosecutor in charge of the case. After meeting Tae-in, he loses his mind due to the overwhelming pheromones he gives off. Dan-woo shows favor to Tae-in, who seems mentally unstable, and leaves a deep mark on the life of the man who only knew Beom-jae... Between a gangster and a prosecutor, a passionate omega ex-convict from the streets, will he be able to escape the shadow of misfortune?