As a nit pandemic sweeps the school, Julia finds herself accused of triggering a second wave. Ostracised by the other mums, Julia needs to find a way back into their good books so she throws a nit treatment party that brings everyone's drama (and headlice) into her home. The party reveals that Anne has some big news, Meg is facing a crisis, and Kevin has committed a terrible crime of passion. As Amanda super spreads the gossip, Liz waits for news about a career move.