In this world, there are many people who seem to be wandering along a relationship border-lining 'friends' and 'lovers'. This borderline is also commonly known as the FRIEND ZONE. It is a special area for those who are stuck in the middle where they cannot really stay friends with their close friends, nor move forward to be their friends' lovers.

Ib and Boum decide to commit suicide together in Bangkok in 1997. After reneging on the promise, the vengeful ghost of Ib returns 20 years later to haunt Boum and her 15 year old daughter, Bell.