Seven Minuets.

It may seem like a short amount of time. However when you're sleeping seven minutes feels like an eternity.

For Oh Haneul, seven minuets helps her bring lost souls (ghosts) to heaven. But only when she sleeps. 

She then meets Byun Baekhyun, however he's not a lost soul. He needs help finding out how they came to meet. More importantly why he's meant to be dead.

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