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Gi-soo, Myeong-sik and Ah-rom were members of the same notorious motorcycle gang. They enjoyed their days roaming the streets recklessly on the motorcycles. Now, Gi-soo works as a motorcycle delivery man, Myeong-sik is a motorcycle cop and Ah-rom is a pop idol singer. One day, Gi-soo has Ah-rom riding on the back of his motorcycle as he makes a delivery. To his surprise the delivery package explodes. Gi-soo's cellphone rings and he hears a voice telling him that their is another bomb planted in his helmet which Ah-rom is wearing. Gi-soo is ordered to take another delivery. If the delivery is late or he attempts to run away the helmet will explode...