The Shipping Agent has Disappeared

Mrs. Lemardeley, an elderly lady living in Granville, is attacked one night in July. Customs officer Weber, asked by the local police to investigate, suspects that burglary was the real motive. Except nothing is missing. When Mrs. Lemardeley's two children are also both victims of the same man, Weber starts to look into the family's colonial past. Who is the attacker and what is his interest in the family ? As the criminal manages to repeatedly evade capture, Weber follows a trail of clues which eventually lead him to discover the truth.
But can he find his man before it's too late ?