By day, Salaryman Rokurou Okajima is diligently trying to climb the ranks at his company. But his career aspirations are dashed when a business negotiation in Thailand takes an unfortunate turn, and he becomes a hostage of the ruthless pirate mercenaries known as the Lagoon Company. After his ransom is denied, Rokurou makes a daring choice: he joins the very crew who abducted him. Now a member of the infamous gang, Rokurou must adapt to life in the seedy underworld of Roanapur, a lawless city where danger lurks around every corner. His new colleague, Revy, is a wild and trigger-happy gunslinger, and their personalities clash at every turn. As he navigates his way through the treacherous world of crime, Rokurou must also come to terms with his past and keep a hold of his morality. With his life constantly on the line, Rokurou must make difficult decisions in high-pressure situations in order to survive. But as the Lagoon Company's illegal trading becomes increasingly risky, he realizes that the stakes are higher than just profits—he must fight to protect his newfound family.