A soul from modern Earth transmigrates into the weak seven-year-old body of Sakazuki, an orphan consumed by pirate-born rage. Armed with past-life knowledge and command of the devastating Magma Magma Fruit, he ascends through Marine ranks with an iron will, refusing to be crushed by his tragic origins. Yet the institution sworn to protect justice harbors festering corruption, blurring the distinction between righteous defender and tyrannical oppressor. Undaunted, Sakazuki carves his own destiny—a path forged in inferno and bloodshed. From a vengeful child to the Marines' most formidable force, witness his transformation into a titan who will ignite the seas and reshape order itself from the ashes of chaos.