The Substitute is the White Moonlight

Willow Vance and Ethan Stone grew up as childhood sweethearts, yet a rival who has long secretly loved Ethan decides to take Willow's place. After a serious accident, the world believes Willow is dead, but she survives with most of her memories gone, retaining only fragments of the orphanage where she was raised and a determination to uncover the truth. The rival undergoes plastic surgery to resemble Willow and draws close to Ethan, then crosses paths with the real Willow, whose face is still healing. Their uneasy arrangement sets up a tangle of identity, longing and a bitter desire for revenge.