After finding an old camcorder with footage from a summer they don't remember, five high school friends set out to uncover the truth-only to realise that some memories were erased for a reason.

A girl Hee Sung is facing her fear to perform her final assessment as a trainee to debut as an idol but her evil self holds her back. A cashier and a student called Ye Dam is finding opportunities to get a normal lifestyle. They both meet eachover and figure out each difficulties.