Taro Sakamoto was once the greatest hitman the underworld had ever seen, feared by every criminal until he did the unthinkable: he fell in love, retired, and gained a significant amount of weight. Now a humble convenience store owner, his peaceful days of stocking shelves and raising a daughter are shattered when his violent past finally catches up to him. Every bounty hunter and legendary assassin in the business is suddenly gunning for his head, forcing Sakamoto to dust off his deadly skills to protect his quiet neighborhood. The stakes skyrocket when a massive bounty is placed on his life, turning his domestic bliss into a high-octane battle for survival against an organized underworld threat. Sakamoto must navigate these lethal encounters while adhering to a strict "no killing" rule imposed by his wife, a vow that tests his legendary reflexes in increasingly creative ways. Even as old rivals and new killers try to drag him back into the shadows, he balances the chaos with a heart of gold. Sakamoto will stop at nothing to defend his shop and ensure his family stays safe, proving that even a retired legend will do anything to protect his simple dream of a peaceful life.