Reborn into the treacherous world of One Piece, Luo Xing finds himself in the most dangerous position imaginable: the son-in-law of Kaido, the strongest creature alive. Tasked with bolstering the Beast Pirates' dwindling forces, Luo Xing unlocks a revolutionary System capable of synthesizing Monster Cells. Unlike the flawed SMILE fruits that leave many as mindless Pleasures, these cells guarantee a massive surge in combat power for any user.

From transforming lowly grunts into elite warriors to empowering the Flying Six to challenge the All-Stars, Luo Xing's invention promises to realize Kaido's dream of an invincible Zoan army. As he navigates the brutal hierarchy of Onigashima, Luo Xing must balance his ambitious father-in-law's expectations with the skepticism of commanders like King, Queen, and Jack. With unlimited funding and the freedom to experiment, Luo Xing begins reshaping the balance of power in the New World, one enhanced pirate at a time.