Min-ju, a talented K-pop trainee, loses her boyfriend Tae-hyun, a skilled dancer, in a tragic accident. Consumed by grief, she quits dancing, but Tae-hyun's ghost appears, and they start dancing together again. As Min-ju uncovers secrets about Tae-hyun's past and death, she confronts rival trainee Yoon-ah, who seeks to destroy her career. With Tae-hyun's ghostly guidance, Min-ju finds closure, debuts as a successful K-pop idol, and moves on with her life, honoring Tae-hyun's memory.