2 years back, you saved a man from from an accident as he was standing right in middle of a busy road. He seemed.. completely out of life. He never saw your face but just your swan necklace as he got unconscious. You never saw him either, as that day his face was covered with a mask.

In present time.

You work as a manager for one of the biggest group in kpop industry, stray kids. Bang chan, the leader of the group was the man you saved that day, but either of you are oblivious to it. One day, you were at his home unannounced when you found him in his study where he lets nobody in, looking at a portrait of a girl. She didn't had a face just a swan necklace dangling from her neck. It seemed.. a bit too familiar.