“I’ll kill him for you. In exchange, you have to keep your promise….”

Kim Yoo-young was nearly raped by her fiancé, but she was saved by Han Seo-kwon, a stalker who had been following her. This time, he promises to kill Yoo-young’s father to save her from his relentless violence.

“F-from now on… you can’t d-die without my permission.”

The price of the promise is that she must not die without his consent. However….

“Why didn't you keep your promise?”
“How… can I… not die…?”
“There is no such way.”

For Yoo-young, whose only goal in life was to set her mother free, there was no longer any will to live.

“You must not die.”

'But why does this man go to such lengths to tell me not to die?'