Inspector Colby (Geoffrey Keen) is on the case, Tim's brother was killed by a gang of diamond smugglers but he sent a postcard to London before he died with the information the police are after. Then Alison turns up very much alive in London. Just how is Tim's brother Dave (William Sylvester) involved...
An enjoyable crime drama with Noir touches. The film takes some time to get going but when it does there is a rich and complicated (though straight forward) plot.