Hugh Macdermott is a business man who is having troubles with his business,his business partner,his partners son and his wife.The son is not only forging cheques but having an affair with the wife.McDermott discovers the lovers together and confronts them..McDermott says he is thinking of killing them both.However his wife decides to poison his drink but the son takes it and she has to admit her plan.McDermott is seen jumping off a cliff but survives.However the fall has caused him to get amnesia and has no memory of the previous 4 days.He is remembering small things and she is worried he will remember big things.Trouble is that lover boy comes back and it all kicks off.However the ending is a bit of a let down.