Gemma Kaliski and Amy Ford have been best friends for years. They share the same interests and sense of humour - and the same contempt of tall, thin blondes, whose only talk is of boys and fashion. Now almost over night, Amy has changed: she's into salads and diet Coke; she's got a new hairstyle, wardrobe and set of friends. Gemma - short, dark and full of figure - finds herself part of a group of unglamorous oddballs, nicknamed the Martians. Torn between the weird and the perfect, Gemma's soul-searchings contain humour and heartache.