With their headmistress under lock and key in her majesty's prison, the St Trinian's girls find themselves under the protection of the army. However, when the sixth form take a fancy to winning a trip to Italy through means fair or foul, the army discover this is one battle they can't win. Let loose in Europe, it is not long before St Trinian's have succeeded in endangering European relations.

Ric Martin, an ice house worker, murders women in blind rage after a traumatic accident which occurred at his workplace. Ric’s identical twin brother, police officer Fred Martin is then assigned to investigate the case.