Everyone believes that they have to do their best in order to enjoy their life. Everyone wants to be remembered once they are gone. But, what if you don't have time enough to achieve everything you have planned? Time is running out for Jennie Kim. If she wants to reach her goal, she better give her best before "That" comes for her. But, has any of them ever wondered why does "That" come every time? Why is he so frightening? Who's "That"? That's something Jennie will need to discover before the time is off.