Ethan disguises himself as a cleaner to infiltrate Harrington Group, seeking revenge on CEO Sebastian for his father's death. Sebastian sees through the ruse but develops feelings amidst their clashes. The truth reveals Arthur, Sebastian's father, as the real culprit, but Sebastian takes the blame to keep Ethan alive. Transforming from adversaries to allies, they orchestrate a billion-dollar corporate trap to bring Arthur down, ending the feud and founding a new company together as Wall Street's power couple.