Northerner Joe Lampton becomes involved with Lord Ackerman, the powerful chairman of a pharmaceutical concern, his beautiful wife Alex, and daughter Robin. But trouble starts when Joe is made Managing Director of one of Ackerman’s companies and makes a shocking discovery: his predecessor committed suicide...

British crime film directed by Peter Duffell and starring Bernard Lee, Moira Redmond and John Van Eyssen, loosely based on the 1918 novel "The Man Who Knew" by Edgar Wallace.