"I'm doomed..." A revived parallel realm that is cloaked in mystery and intrigue suddenly opens and arises from a forgotten region of our cosmos. Among those who seek the unusual, stories of its existence have long existed. Some think of it as a realm of imagination, while others refer to it as a doorway to the unknown.

The story portrays a friendship, love and rebellion life led by a young chaebol girl, Kim Taeyeon and her other self in the real world. Both hold the power of the Golden Dragon ring that controls an access to the parallel world. As two opposite human beings switched places in a divergent world, Will they ever solve the mystery of the dragon ring and get back home?