Chronicle Of A Blood Merchant (2014)

, poor but good-hearted Heo Sam-gwan sets out to win the most beautiful girl in the village, Heo Ok-ran, by selling his blood to earn enough money to marry her. 11 years later, the two are happily married with three children, but their family undergoes a crisis when Sam-gwan';;s eldest son doesn';;t resemble him and rumors spread about the boy';;s paternity.