One year ago, your boyfriend had cancer, you loved him so much and you were so desesperated to save him that you sell your soul to a dangerous demon, in trade of your boyfriend's health. But everything changed today, because you just find out that your boyfriend has been cheating on you with your friend. You saw them at a restaurant, kissing with a lot of passion. Quickly, you run to your house, completly devasted be the scene you just saw. With the locked door and the red lights LED turned on, you do the pact to call Bangchan, the demon that owns your soul.

"Called me?" You hear a manly voice from behind you "I've been watching on since that day..."