Monster

In his youth, Lee Guk-cheol lost his wealthy family as well as his sights due to the orchestrated car accident and his inheritance to his greedy uncle, Byun Il-jae who plans to steal the inheritance to invest in his scheme to buy out Dodo Group, a powerful conglomerate. Despite his blindness, Guk-cheol gains superhuman hearing. Guk-cheol's aunt Moon attempts to expose her husband in revenge for his infidelity was killed by Il-jae's mistress who is also her best friend. He lost everything and descended to the lowest echelons of society, from spoiled rich heir to lowly beggar almost overnight. However, with the help of Yoo Seong-aean, an NIS agent who investigate the Dodo Group, opportunity arises whereby he is able to obtain a new identity - Kang Gi-tan, allowing him to take back what is rightfully his and enact vengeance on those responsible for ruining his life. However, in his quest for revenge, he meets opposition in the form of Do Gun-woo, the illegitimate son of a chaebol chairman, and Oh Soo-yeon, a young woman who seem suspiciously similar to someone he developed feelings for in his youth. It is revealed that Bryun Il-jae works as executive for the Dodo Group and secretly manipulate the stock market of the company so he can buy out the company at cheap price. Do Gun-woo is used as a mean for Il-jae to take down Do Choong, the chairman of Dodo group from within. As Guk-cheol climbing the corporate ladder, he teams up with Do Choong to take down Il-jae by exposing his entire scheme to the Chairman. Do Choong wants to learn about Ki-tan's motive in bringing down Il-Jae but he Ki-tan declines. Do Choong suggests a simple solution is to simply fire Il-jae but Ki-tan states that it will not work since Il-jae can still find a way to take over his company.