"Call me Sana-unnie, we dont have to be strangers. I want to help you fix your problems, Dahyun-ah, if you'd let me."   "Okay, unnie. Help me then, and I'll help you."  

When a blizzard forces Dahyun to seek shelter in a seemingly abandoned cabin in the middle of nowhere, she uncovers dark secrets. Secrets that were meant to be kept.

Dahyun had always hated Valentine's Day. She'd always envied the other couples, seeing as she'd never really had a real relationship herself. However, when she finds herself getting notes throughout the day from a secret admirer, she notices her views have changed.