A kind-hearted nurse working in psychiatry goes above and beyond to be a ray of light for those under her care, despite the challenges coming her way.

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.