One Fine Day (2006)

A brother and sister are separated when their parents die in a car accident. 15 years later, with Seo Gun living in Australia and Park Hae-won living in South Korea, fate reunites them. Gun has been adopted by a family of swindlers and is desperate for money to pay for a heart operation for his half-sister. When he learns that Hae-won had been adopted by a wealthy family, he rushes to South Korea to set up a scam. However, there are many family secrets that must be revealed before the two can be truly reunited and find true love.