After Phillip and Max tell Emma how well behaved they were when they were younger, Emma wishes to travel back twenty years to see for herself what they were really like at school. Back in 1987, Emma encourages the teenage Max and Phillip to skip their maths exam and audition with their band in front of a famous record producer. But while Emma is having fun back in the Eighties, Sophie and Adil discover that tampering with the past is having disastrous results in the present