Ho Woo becomes the first and only high school graduate to join the country’s top accounting firm. Gifted with a sharp memory, keen observation skills, adaptability, and an unshakable sense of justice, he quickly proves himself to be anything but ordinary.

At the heart of the firm is Vice President Je Kyun, a man known for his charm but driven by ruthless ambition. His son, Seung Jo, is the firm’s star accountant—precise, calculating, and the complete opposite of Ho Woo.

Though Ho Woo and Seung Jo have different motives, they find themselves on the same path, using numbers as their weapon in a firm riddled with secrets and power plays. Can they expose the truth and bring justice to a system built on manipulation?