The Key of Love

Three best friends-Mye Kim, Einna Lee, and Nana Smith-spend their afternoons together in their large cozy treehouse, laughing, talking, and enjoying their childhood adventures.

One day, Nana hears a disturbing rumor: her father may be secretly seeing another woman. Confused and worried, the three girls decide to follow Nana's father to discover the truth for themselves.

As they quietly watch from a distance, their hearts sink. The rumor is true. Nana's father is meeting another woman. The girls see them embrace and kiss, confirming Nana's worst fear.

Feeling angry and protective of her friend, Einna secretly casts a small invisible spell to make the mistress uncomfortable and hurt slightly. The woman suddenly feels pain and decides she does not want to continue the meeting that night. She tells Nana's father they will meet again tomorrow.

The girls begin to follow Nana's father as he walks back home.

But suddenly-

A terrifying scream echoes from the mistress's house.

Startled, Nana's father runs back toward the house to see what happened. Hidden nearby, the girls watch in horror as something unimaginable appears.

A huge, hideous monster emerges from the darkness. Its body is twisted and unnatural, its presence terrifying beyond words.

In a horrifying moment, the creature rips off the mistress's head and bites into the side of her neck.

The night becomes silent again.

None of them understand what they just witnessed.

But this is only the beginning.

What terrible secrets lie ahead for them? And what role will the mysterious "Key of Love" play in the future?