xu dongju (played by park hyun-sik), the head of the dashan group's secretary's office, is an active subordinate on the surface, but in fact he is ambitious and has always been eager to reach the top of the group. by chance, he accidentally received a 2 trillion won black gold. he originally wanted to use this money to change his destiny, but instead he was in danger of his life to fight against the mastermind behind the scenes.