Lin Yi is forced into exile due to a family curse that causes his body to gradually crystallize, and he must find a way to lift the curse before it completely consumes him. In order to find a solution, he came to the "Raven Inn" and met the mysterious proprietress Irene. He discovered that Irene could slow down the spread of his curse. The two individuals with linked fates restricted and depended on each other... And finally understood that he and Irene were the "locks and keys" that guarded human civilization.
