Mercy is a body-traveler, and never knows where she will end up next. When in a particular body, she tries to make the best of the situation and "leaves it better than she found it". This totally reminded me of Quantum Leap! At the start of the book, Mercy wakes up in a girl named Carmen. Carmen is on a music-exchange trip and can sing like an angel. She is staying with a family, who is grieving the kidnaping of their daughter. Mercy gets involved and starts to help the brother in a search to find his sister. That's when all the adventure starts! Who and what is Mercy? Who is the mystery guy, Luc, that she dreams about? When will she get back to her own body? Will she ever see Ryan again? 
 This story was thrilling and kept me on my toes. (Especially with the Australian references!) The characters grew on me and I felt invested in this story - the cliff-hanger ending was agonizing! How will I wait to know what happens! 
 This advance copy was provided by the publisher via NetGalley.