Kang Ji-won, a terminally ill cancer patient, is killed by her husband and best friend after she witnesses them having an affair. She wakes up 10 years before the incident and decides to seek revenge with the help of Yu Ji-hyuk, a director at the company where she works. Now, she must reclaim her fate and eliminate the trash from her life.
Song Ha-yoon (born Kim Mi-sun on December 2, 1986) is a South Korean actress. She debuted as Kim Byul (Hangul: 김별) but changed her stage name to Song Ha-yoon in 2012. Description above from the Wikipedia article Song Ha-yoon, licensed under CC-BY-SA, full list of contributors on Wikipedia