Koichi Miyazawa runs a small, but longstanding company which makes tabi (traditional Japanese socks). He is the CEO of the fourth generation company with about 20 employees. Due to a decrease of demand for tabi, the company is struggling to keep afloat. Koichi Miyazawa thinks about launching a new product line. The new product is running shoes. For the company's surival, Koichi Miyazawa begins to develop running shoes using their accumulated knowledge for making tabi.

The story of people driven by greed. Kang Pil-Joo grew up at an orphanage, but he now works as a managing director of a legal team at a corporation. He is acknowledged for his intelligence and his exemplary job performance. Some of those that work around him are jealous of him. Na Mo-Hyun is an environmental activist and a science teacher at a middle school. She is a good listener and laughs a lot. She dreams of a love driven by fate.

Can Amatsu Gai's plans to create ZAIA's ultimate weapon come to fruition? He will use every tool at his disposal to make it 1000% so.