Ji-won Ha

Ha-yeong is dumped by her boyfriend on the 100th day of their relationship, an important milestone for every couple. Hyeong-jun is a wealthy and handsome man who melts women wherever he goes, but is not interested in dating. One day, as the later is driving his luxury car, the two will meet. Disgruntled by her recent rejection, Ha-yeong kicks a soda can out of frustration, which finds its way onto Hyeong-jun's head. Startled by the impact, he loses control of his car and scratches it against a wall. When Ha-yeong is unable to pay for the damages, he persuades her to repay him by signing a contract that binds her to his service for 100 days. What happens next is strictly by the (silly) book and inevitably, they both start having feelings for one another.

Post-war South Korea in 1953, Heo Sam-Gwan (Ha Jung-Woo) works on a construction site and helps his uncle to farm. The guys in his village can't get married, until they are able to sell their own blood. By selling their blood, they prove they are in healthy condition and are able to make a lot of money. One day, Heo Sam-Gwan sees Heo Ok-Ran (Ha Ji-Won). She's the most beautiful woman in the village, but she is already dating wealthy playboy Ha So-Yong. Heo Sam-Gwan decides that he will marry Heo Ok-Ran. He sells his blood and makes enough money to marry her. 11 years later, Heo Sam-Gwan and Heo Ok-Ran are happily married and have three sons, but a rumor spreads around the village that Heo Sam-Gwan isn't the real father of their eldest son.

Professor Kim, a marine geologist, recognizes the impending danger of a mega tsunami headed straight for Haeundae, a popular vacation spot on the south coast of Korea. He desperately attempts to warn authorities and alert the unknowing vacationers of the 500 MPH destructive force of nature headed their direction.