 Safe-designer Richard Logan (Franklyn) comes to consciousness on a patch of waste ground with no recollection of how he came to be there.Assuming he must have been attacked and hit over the head, but feeling no apparent ill-effects, he returns home to wife Julie (Redmond) to apologise for being late and tell his story.He is astonished to learn from Julie that he has been missing not for a few hours, but for three weeks.