When Cardia is awoken in her Welsh estate by the handsome thief Arsène Lupin, she can’t possibly imagine the journey she has ahead of her… and the dangers that await. Fortunately, Cardia is not entirely helpless–the mysterious gems embedded in her chest grant her poisonous skin, which can melt away anything that touches it.

But where did the gems come from? And will she ever be able to touch another person without killing them?

To discover the answers to these questions, Cardia travels with Lupin to London, where she encounters other handsome strangers who quickly devote themselves to aiding her quest. Cardia must work hard to uncover the mystery of her own existence and answer the questions that have been plaguing her since the fateful night she met Lupin: who is chasing her, what do they want, and where has her father gone?