Genius Grandson of the Loan Shark King

Story:

Even criminals fear the merciless Loan Shark Empire; will Kim Mu-hyuk, the grandson of the loan shark king, be able to take the throne? Kim Mu-hyuk aspires to be acknowledged as a member of the Cheon Family. He is the grandson of the legendary Loan Shark King Cheon Tae-san, to whom even South Korea's affluent aristocracy submitted. Despite his best attempts, Mu-Hyuk is killed in a brutal conflict over his grandfather's inheritance by his uncles, who betray him. Nevertheless, he awakens in the 1990s with the opportunity to alter his destiny, rather than passing away. Mu-hyuk sets out to maintain his broken alliances and exact ruthless retribution on his uncles and anybody else who stands in his way, driven by his determination to stop the murder of his grandmother, who reared him, and restore the Cheon family's legacy. Despite having earlier been a nuisance, Mu-hyuk gradually gains his grandfather's trust by excelling academically and socially. Mu-hyuk starts controlling the underworld as he establishes his position in the family, taking command of powerful individuals in politics and business as well as criminal groups. Step by step, he makes his way toward realizing his goals and getting his retribution.