Hannah, a tutor, receives a high paying job offer at a mansion on a remote island. There, she meets the young and kind owner, Ian, and his younger sister, Hannah's soon-to-be student, Ailee. A tutor's fresh start working on an island. However, when strange things begin to occur at the seemingly peaceful mansion, she finds that there's more to it than meets the eye. Gradually, Hannah discovers the secret between the two siblings and the island itself… ※GL is included in the love triangle for this series and is being partly covered within the story.