At the age of eight, Park Joo-hyung (Song Joong-ki) 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, head of the Cassano Family who treats him like a son. Renamed “Vincenzo Cassano” he becomes a lawyer, a consigliere for the mafia, and Don Fabio’s right-hand man. After Fabio dies, Paolo, Fabio’s biological son and the new leader of the Cassano Family attempts to kill his adoptive brother out of jealousy because Fabio favoured him over his own biological son.
Vincenzo flees to Seoul and sets out to recover 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.
