Where mythical creatures fight for the key to open the gate that connected human to mythical creatures.Hayoung-a vampire who has cold personality but good on the inside will do anything to protect the key.Naeun-is a human that yet to discover what she is.Eunji-is a werewolf hayoung best bud that bound to help her in the journey.Chorong-is hayoungs mentor guiding and helping her in every situationBomi-is a wiccan a trustful comrade of hayoungNamjoo-is a succubus will help hayoung in her journey.Together their set off on a journey to find the key and to protect it from being used by the evil doer.