Magistrate Norma allows her sister Emily, a children's author, and Emily's failure of a husband Bob to live in a house in her grounds. Bob's first wife died in mysterious circumstances and when Emily disappears Norma is deeply suspicious that she has come to harm despite Bob's assurances that she has merely gone somewhere quiet to complete her latest book. However, the opportunistic Bob comes to realise that it could be in his interests to play along with Norma's doubts.
—don @ minifie-1