Rock Okajima, also known as "Rock," has joined Lagoon Company, a group of pirate mercenaries operating from Roanapur in Thailand. Although initially resistant, he now calls this notorious slum his new home after being stranded with only the clothes on his back and his moral compass. As part of the crew, Rock is required to perform tasks alongside other members. However, he faces criticism for lacking courage as he navigates through the dangerous underworld. He must decide whether to remain amidst the violence and brutality or risk everything to gain freedom. His choice will impact the Lagoon crew who welcomed him into their community.