Novelist Catherine Tramell is once again in trouble with the law, and Scotland Yard appoints psychiatrist Dr. Michael Glass to evaluate her. Though, like Detective Nick Curran before him, Glass is entranced by Tramell and lured into a seductive game.

The Church sends in a team to investigate the tragic deaths of a young group found in the crypt of a Convent.

Late September takes place over a 24-hour period, in a beautiful Kent house and garden, and follows the course and aftermath of a birthday celebration organised by a middle-aged woman for her husband to whom she has been married for nearly 40 years. As the day and night progress, old rifts, new relationships and secrets emerge amongst friends, and the underlying tensions in the marriage can no longer be contained.