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Ji Yeon is a beautiful university student, majoring in music. She is dating Dong Seok, but Dong Seok’s parents want him to study abroad. The day before he is scheduled to leave South Korea to study abroad, he prepares a proposal event for Ji Yeon. Ji Yeon does not appear at the event. Meanwhile, a rumor exists about the old apartment building where Ji Yeon lives. The rumor is that a ghost appears in the apartment building.

Thousands of years ago, the cruel Simo tribe made a crystal coffin out of meteorites outside, trying to use its mysterious power to expand its power. Unexpectedly, the rebellion inside the door detonated the mysterious power of the crystal coffin....

Mnet's female dance crew reality survival! Female dance crews, representing South Korea, compete to be the No.1 team.