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After missing the village bus, Da-eun sets out on foot to reach her village in the remote mountains. As she stumbles wearily along, her sweaty clothes flapping in the midsummer sun, a man stops his car and offers her a ride…for a price. In the heat of the moment, Da-eun makes a choice that will take her on the ride of her life.
One day, the owner of the divine universe makes a wager with Mephistopheles, a being from “the other side.” Their wager was to see whether a special soul born on earth would grow up to become a servant that follows the divine path or the wicked one. In present time, mid-19th century Prussia, Martin, an aspiring novelist meets a mysterious Elysse Wagner at a countryside inn. Together, they end up embarking on a journey to find an ominous group that claims to know a way to bring the dead back to life. Only, there is more to Elysse than Martin could’ve ever imagined…
The bustling metropolis called Yakusoku, known to many as the "City of Promise," is filled with chaos and mischief. Gang warfare, government corruption, and the supernatural all run rampant across this plagued community. In the midst of it all, a rabbit loving bounty hunter, a young billionaire, a normal high school student, and those aligned with them will have their lives intertwined whether it's by choice or by chance. There will be people to meet, battles to fight and mysteries to solve. If we're being honest, some of you are just here to hang out, and that's cool too. We hope you enjoy your stay, but don't say we didn't warn you.