Caroline Hartley and the Magic Key

Caroline Hartley is a typical teenager who lives in Welwyn Garden City. She is about to finish her classes at the end of the school summer term. Whilst at school her mother receives a brown padded envelope that has a Zurich postmark on. It is addressed to Ms C. Hartley. Thinking it is addressed to her ex-husband Chris, who has a bank account in Switzerland, she asks her daughter to give it to him....