Unfortunately for Kate, who was forced to give up teaching after kissing student Noah Parkin, her past comes back to haunt her as the new crop of students begin to gossip about her actions.
Kate - played by Ashleigh Brewer - then faces further humiliation when new boy Harley brings up the incident and cheekily suggests he would be happy to follow in Noah's footsteps.
"Kate shows the class that she's not to be messed with by punishing them all," an insider told the Daily Star. "But she's got a tough time ahead. Some kids are going to make her suffer."
Neighbours airs weekdays at 1.45pm and 5.30pm on Channel 5. Viewers will be able to see Kate's difficult return to the classroom later this autumn.