Salaryman Rokurou Okajima spends his days attempting to climb his company's corporate ladder, until a business negotiation in Thailand goes wrong. During the failed deal, he is taken hostage by the Lagoon Company—a group of ruthless pirate mercenaries. Abandoned by his managers who refuse to pay his ransom, Rokurou does the unthinkable: rather than begging for his life, he joins the crew that kidnapped him. Now a member of the group, Rokurou must adapt to his new home in Roanapur, a dissolute hellscape where corruption and crime run rampant, and even a minor mistake could cost him his life. Aside from the numerous crime syndicates on the island, Rokurou also constantly clashes with his brash, gunslinging colleague, Revy. As Rokurou struggles to leave his past behind—and with more than just the profits from the Lagoon Company's illegal trading at stake—he must quickly find the resolve to make tough decisions in high-stress situations while maintaining his humanity.