"Jeongman," tired of the same daily life every day, comes up with a part-time idea of "human sandbag" that exchanges money for a mill while trying to make money. From that day on, the feisty guy "Hwi" and the strongest millhouse "Minkyu" become a team and go up the road with only one glove in their hands. However, the deviation is brief, money and instincts are not easily satisfied, and the thirst of blood-sheding fighters is deepening. One day, the mysterious alumni "Yoo Young," who appeared in front of them, made an unconventional offer to make three times the profit, and they entered the secretly operated martial arts gambling board.

'Jung-man', tired of his daily life, comes up with an idea of 'human sandbag' as part-time to make money. From that day on, the tough guy, 'Hwi', and the strongest guy 'Mingyu' teamed up on the road with only one glove in hand. However, escape is quick, neither money nor instinct make them satisfied, and the blood-boiling fighters' thirst is only getting deeper. One day, a mysterious alumni, 'Yoo-young' appeared and made an extraordinary offer to triple their profits, and they secretly got themselves in running a gambling den. The dumb-heads jumped into a fight in the gambling den instead of the streets. The moment the betting begins, there is no turning back!