Roberta is an ex-pupil of this most disciplined of schools, where every infraction is dealt with in a severe way, where rules are rigidly enforced and the regime is stringent in the extreme. Life in the 'I.T.' world has proved too much for her and she yearns to return to the starkly controlled way of life. The school needs an 'I.T.' teacher and Roberta, together with Fiona and Francine, join the regime as probationers. They immediately find out the hard way that it is going to be a rough ride. Lessons in corporal punishment are both theoretical and physical. The three women are brought to the right frame of mind to serve as teachers in the stark, harsh, disciplined world of Strapwell School.