This is the second novel of the Everneath series. Nikki Beckett escaped the tunnels, but only because her boyfriend, Jack, took her place. Now she embarks on a journey to save Jack and find a way for them both to live out normal, human lives. Unfortunately, she has to depend on Cole - the life-sucking everliving who took her to the Everneath - to help her save the love of her life. Nikki continues to trust Cole even when she knows she shouldn't. Will he be the friend she hopes for or betray her yet again?
The mythological elements are a little stronger than in the first novel, more mention of the Persephone myth, and readers might also recognize elements of Dante's Inferno.