After a car accident, Tae-Min finds himself in the body of Si-Won, who was a victim of bullying at school. No longer a pushover, he starts standing up for himself but then meets Woo-Jin, an old friend from the past. Somehow, Woo-Jin immediately picks up Tae-Min's 'scent' from Si-Won. What happened between these two in the past and how will it affect their future?

(Source: Lezhin)

Note: Includes two special chapters and six side story chapters.