Alison Jenner, the owner of a large wealthy estate, is being blackmailed. An unknown person is sending her threatening letters, hinting that she is a murderer. Fearing that this will come to light and harm his wife's good name, Jeremy...
Jenner invites a familiar couple, Meredith Mitchell and Superintendent Alan Markby, for a visit and asks them to unofficially investigate the matter. Markby is not ready to get involved; the case seems to him fabricated. But when the body of Jenner's daughter Fiona is found in the lake, he can no longer remain on the sidelines.
Alison Jenner, the owner of a large wealthy estate, is being blackmailed. An unknown person is sending her threatening letters, hinting that she is a murderer. Fearing that this will come to light and harm his wife's good name, Jeremy Jenner invites a familiar couple, Meredith Mitchell and Superintendent Alan Markby, for a visit and asks them to unofficially investigate the matter. Markby is not ready to get involved; the case seems to him fabricated. But when the body of Jenner's daughter Fiona is found in the lake, he can no longer remain on the sidelines.