A blossoming romance between Father Ted and steamy novelist Polly Clarke threatens to come between a group of visiting nuns and their favourite priest. Among other things, Ted delivers an entire service in a matter of milliseconds, and becomes involved in an armed robbery.

Ted and co. enter a giving-things-up-for-Lent contest and soon discover that abstinence is easier preached than done. Father Jack sobers up for the first time in years, but Dougal and Ted find their resolve wavering. To strengthen their vows Ted calls in a nun to supervise them. She turns out to be a sadist of the first water, and the results are inevitable.