Shin Yu-ji is the hidden heiress of Boeun Enterprise, living a quiet life to pursue her dream of becoming a writer. Her world changes when she meets Kako — a fallen angel serving his sentence at Switch, a café where human wishes come true. When Yu-ji refuses his offer to grant her wish, she ends up working beside him instead. As they grant wishes together, forbidden feelings spark between them. But love between a human and an angel is a sin in heaven. A shared, haunting dream hints at a past they can’t remember — and a fate they can’t escape. What is Yu-ji’s real wish… and will their love survive the price of breaking the rules of heaven?