Idol....

Mysterious past

4 years ago, 18-year-old Shinbi was very happy to be a trainee.

So I danced hard too

신비

Ha... I became a trainee because of my mom, but is that a good thing?

But something big happens during the first year of training.

신비

Huh? Sowon? Where's Nayeon?

소원

Well, I have a debut evaluation tomorrow...

While Shinbi is looking for Nayeon, she receives a phone call.

신비

hello..?

시민

Oh, are you a Source Music trainee?

신비

Yes... but who are you?

시민

Ah.. This is the main gate of ㅇㅇ School.. A Source Music trainee is collapsed....

신비

'Hey, is that really Nayeon?'

신비

Yes.. I'll go there.. .

신비

Where is the fallen person?

The mystery man approaches to check on someone.