JoJo's bizarre adventure. Part 7, [vol.] 7. Steel ball run

"After meeting with Gyro and Johnny, Lucy Steel has reluctantly agreed to steal the heart of the Holy Corpse from the president of the United States. But while Lucy attempts to get dangerously close to the president in Chicago, Gyro and Johnny are attacked on the frozen Straits of Mackinac by an assassin using steel balls just like Gyro's! Will Gyro be able to defeat someone with total knowledge of the Zeppeli family's techniques, or has he finally met his match?"