It's the day of her language exam, and Lara wakes to discover, in horror, that she's started her period. She's frightened to tell anyone, and concerned about what everyone will think. When she confides in her friends, they whisk her off to the local supermarket, where she is introduced to the wonderful world of sanitary towels and tampons.The boys learn what's happened to Lara, and upon realising that the girls are changing, they question what it will mean for their friendships. Their fear is exacerbated by Max, who says that the girls will only be interested in older guys, like him. With the help of her friends, Lara finds that her concerns are dissolved and her confidence boosted. And despite the fact that she is growing up, she proves exactly where her interests lie. and it's not in older guys.