Kissed by a ghost—Sixteen-year-old Jenny Tyler doesn't believe in ghosts, but her recent concussion gives her strange visions. Her aunt's seances to reach the dead produce even more odd sensations. After a seance, Jenny sees a ghost soldier who says he needs help and, with a kiss, takes her to 1914 at the start of World War I. Hurtled through time, Jenny relies on her courage to survive danger in an unfamiliar world. When she finds Jack, a Canadian in the British army, trapped behind enemy lines with a wounded comrade, she recognizes her ghost soldier. At risk of being captured and shot, the three struggle to evade enemy soldiers, outwit attempted betrayal, and reach neutral Holland. Falling in love with Jack, Jenny realizes she is living a past life of adventure and romance.