Minh Khuê is an emergency-room nurse — a quiet young woman who has always lived in the shadow of her identical twin sister. When Minh Hà begs her to step into the role of the Trần Gia conglomerate's lady of the house for "just a few days," Khuê never imagines that the mansion's iron gate will swallow her whole life. In that cold, opulent place, she uncovers a secret that has been buried for five years.