Amy Love, a high school junior, plays a Ouija board with friends one night and unintentionally connects with someone whose, well, not visible to the naked eye. When her body’s taken over and her soul is stuck watching helplessly—she’s terrified. When the zombie guzzles bologna that she will have to work off at the gym—she’s angry. And, when her zombied body pulls up a news article on her laptop about a boy named Jonathan Miller who was recently in a car crash—she’s . . . intrigued.

When the zombie chooses another host, Amy learns that the zombie is actually teen Jonathan Miller, son of the famous Maisy's Meow comic creator Jacob Miller. Jonathan tells Amy he doesn’t know whether he’s dead or alive, only that when he’s not in a body, she is the only one who seems to know he exists.

Amy decides to help Jonathan discover what happened to him and, when they can’t find his body, they try to find a substitute—preferably one that isn’t occupied. On the journey, Jonathan leads Amy into all kinds of danger. To her surprise, he also leads her heart to somewhere unexpected. She’s always heard of love at first sight, not love at first fright, but how can Amy be falling for a boy she’s never even seen?