The Janitor Is the Lost Champion!

Kane, a toilet cleaner at an underground fight club, is a gambling addict everyone bullies. No one knows he is the legendary boxer "The Judge" who vanished five years ago. After refusing to throw the championship match, his family burned to death, and he was framed for arson and murder. He faked his death at sea. To get close to Victor Cross, the shipping tycoon controlling global gambling, he is forced into a contract marriage with Sophia, the mafia godfather's only daughter, and is dragged into a bloody inheritance war between two black-gold families. Fighting his way back to the top, he discovers that the one who sold out his family's location was his own trusted manager and brother. Kane turns the ring into an execution ground, overturns the black-gold gambling empire spanning politics and business, kills his family's murderer, clears his name, and returns as the undefeated boxing champion.