In this dirty world where masters throw their slaves into the fighting arena. Where two fight but only one can emerge as the winner. This dirty, corrupted world. Filled with heartless, filthily rich people who would throw slaves as young as 9 years old to fight in the arena with someone twice their size. This unfair world. 

When Oh Jaemin meets Xi Luhan in the arena, things got different. Will they be able to escape this dirty one and find a new place where they can be happy or will they be slaves forever.