Mrs King is excitedly overseeing the installation of the Worldwide Slang Prevention System or WASP at St Hope's. The creation of leading educationalist Lady Blahga, the WASP units punish inappropriate language or slang by stinging the speaker, thereby improving both speech and behaviour. St Hope's is the last in a series of schools to have the system activated, and Lady Blahga is visiting St Hope's to witness the switch on.

The same day, new deaf pupil Amber Bayes starts at St Hope's and Oscar is instantly drawn to her, much to Avril's annoyance. MI9 have picked up intel about a 'Plan BBB', designed to sabotage the WASP installation. The team discover that St Hope's is gradually being flooded by electro-sonic power from an unknown source that threatens to blow up St Hope's in two hours time - exactly when Lady Blahga will be there. Unsure who is behind the plan, Rose wonders if new girl Amber could be involved and Oscar eagerly agrees to keep a close watch on her.

Meanwhile, Rose attempts to find the source of the power surge and Carrie volunteers to guard Lady Blahga when she arrives. The system is activated and the pupils are horrified when it starts to administer stings and they are forced to modify their behaviour. Oscar observes Amber examining one of the WASP units, but she easily deflects his questioning. However, when Rose discovers that the source of the power surge is Amber's old school, Oscar is forced to think twice. Show less