
Cassidy, a working-class white scholarship girl, saves an unconscious man in the campus old archives, only for his soul to accidentally end up in her body. Hiding his true identity, the man claims to be a Guardian Angel who can grant wishes. When Cassidy wishes to marry Ethan, a wealthy young heir, he teaches her etiquette, art, piano and the rules of high society. The two share pain, hunger, touch and heartbeat, and an indescribable intimacy develops between them during baths, menstrual cramp episodes and love pursuit training. While ostensibly pursuing Ethan, Cassidy is actually using the relationship to investigate the truth behind her mother's death in a mining accident. It is not until the "deity"'s identity is revealed that she discovers the person living in her body is none other than Adrian, the comatose heir to the wealthy family. Faced with romantic betrayal and the family's siege, she refuses to rely on any man to clear her name, instead rallying the victims on her own, defeating the powerful and becoming a state assembly member. She did not climb up the social ladder by clinging to a wealthy branch; she became the lofty branch herself.