Giles Gordon (David Farrar), a partially blinded Englishman on holiday in the South of France, finds himself caught up in a murder case. Giles befriends Alix Delaisse, the widow of a French resistance leader, who reveals that she is now engaged to Pierre Chaval, a man she does not love. Alix disappears, and Giles receives an anonymous phone call instructing him to go to Chaval's flat. There he discovers Chaval's murdered body. Giles leaves before he is implicated in the murder, but can find no subsequent report of it in the papers. Giles resolves to get to the bottom of the mystery, but must first return to England for an eye operation.