The last thing Lily Deene remembers is texting her boyfriend, Simon before going to bed. She awakes in the dark and cold with no idea where she is. With air running out, Lily's in danger of becoming a ghost herself. Nazi prison guard Heinrich Richter decides to leave a war he no longer supports. He undertakes a perilous journey to England and finds something precious he feels he doesn't deserve. Lily and Heinrich will meet in London where they will find that betrayal and love have deep roots.