¿Por que tuve que fallar en ese simple tiro?

Two people met in an unexpected situation agreed to work with each other to get what they want.. Yoo Jeongyeon is a famous successful business man in Korea. He already has it all except for having an heir. He only cares about his reputation and the future of his company. Im Nayeon is a poor hardworking girl. She works 24/7 to pay her late father's debt to a known gangster in Korea