Robin is exiled from society after he is accused of murdering a man named Ibrahim in a fight. Twenty years later Ibrahim's son, Mahmud, begins a search for his father's killer. He soon reaches the island of Sampojo, where he finds Robin. The exile has taken up piracy and now uses the name "Singa Laoet" (The Sea Lion). After one of Robin's men, Hasan, kidnaps a girl whom he loves, Mahmud tracks the kidnapper down and fights him to the death. It is later revealed that Hasan, not Robin, was the one who killed Ibrahim