Right after Ryu Sun-jae, a top star, ends his life, Im Sol, his top fan, somehow ends up at a time when they were in high school and tries to protect him. A fantasy romance unfolds where people who missed each other in time finally meet.

In a 21st-century constitutional monarchy, a woman who has everything but remains a commoner crosses paths with a prince who, despite his royal lineage, feels powerless—leading to a love that defies social status.