Ginger Stuyvesant, an American heiress living in London during World War I, is engaged to Captain Benjamin Harford, an intelligence officer. Ginger is a medium for the Spirit Corps, a special Spiritualist force. Each soldier heading for the front is conditioned to report to the mediums of the Spirit Corps when they die so the Corps can pass instant information about troop movements to military intelligence. While Ben is away at the front, Ginger discovers the presence of a traitor. Without the presence of her fiance to validate her findings, the top brass thinks shes just imagining things. Even worse, it is clear that the Spirit Corps