Vincenzo

At the age of eight, Park Joo-hyung is adopted by an Italian family, but the family later dies tragically in an accident. Joo-hyung joins the mafia and is adopted by Don Fabio, the head of the Cassano Family who treats him like a son. Renamed as "Vincenzo Cassano", he becomes a lawyer, a consigliere for the mafia, and Don Fabio's right-hand man. After Fabio died, Paolo, Fabio's biological son and the new leader of the Cassano Family, attempts to kill his adoptive brother out of jealousy as Fabio favoured Vincenzo over himself. Vincenzo flees to Seoul and sets out to recover a gold bullion worth ₩150 billion ($110 million) that he helped his business partner (a recently dead Chinese tycoon) secretly stash within a hidden basement under Geumga Plaza, a commercial building in South Korea. During an inspection of the building, he discovers that he needs to demolish the place to retrieve the buried gold. However, a subsidiary of a large pharmaceutical corporation Babel Group has illegally taken ownership of the building with the intention of demolishing it to build a business building. Unwilling to let the gold to fall into the hands of Babel Group, Vincenzo must use his skills to reclaim the building and recover his fortune. Among the quirky tenants at Geumga Plaza is the Jipuragi Law Firm run by Hong Yoo-chan, in which Vincenzo finds he has aligned interests. At first he comes into conflict with Hong Yoo-chan's daughter, Hong Cha-young, an attorney for a rival firm, Wusang, that defends Babel Group. Under the orders of Babel's top legal advisor, Hong Yoo-chan is murdered in the middle of the street. Enraged, Cha-young angrily resigns from her firm and takes over Jipuragi and teams up with Vincenzo to take down Babel. It is revealed that Hong Yoo-chan is killed because he managed to discover that Babel Group is a shell company for a drug cartel and left some clues for his daughter and Vincenzo to find. When Vincenzo finds himself getting entangled in a bigger issue with Babel internally, he realizes that conventional legal method cannot do anything against a powerful corporation like Babel, and uses skills he learned in the mafia to fight the corporation, including kidnapping and torturing Babel employees for intel, as well as recruiting the tenants from Geumga Plaza to help him. He also starts persuading mistreated employees of Babel to be their allies to destroy the Corporation from within. Eventually, Vincenzo manages to find a way into the gold vault underneath the building without having to demolish it. Aside from the gold, he stumbles upon a USB left behind by his deceased business partner called the Guillotine file containing incriminating pieces of evidence against Korean politicians, civil servants, and the Babel Group. As both the corrupt politicians and Babel Group find out about the Guillotine file, they seek to obtain and destroy it while Vincenzo dodges their attacks by staying several steps ahead of them.