Sarah is given a lucky penny which has heads on both sides by Dorothy her grandma, since being given the penny everything in her life seems to be going good. Whenever Sarah makes a wish or wants something good to happen she flips the coin. Sarah flips the coin the morning of results and gets fantastic grades she is looking forward to starting college in the next few weeks. Her new relationship with Sam seems to be going great despite all the warnings her friends gave her.

Sarah looses the penny and has a nightmare week after this. Firstly she is told her college course won't be running this year, then her mum accuses her of taking money from her purse and finally her best friend falls out with her over 'spending too much time with Sam'. After all this Sarah feels she has no one to go to other than Sam so she goes round to his in hope of some sympathy and comforting. When she gets there Sam's sister Lucy invites her in and tells her to go straight up to Sam's room.

Sarah goes straight into his room to see him scrambling around trying to cover a bag of things up with his duvet. He starts apologising to her. Confused she goes and looks at what he is hiding . Much to her surprise she finds her lucky penny, the money from her mums purse and some other items of hers in the bag. Completely lost for what to do Sarah says 'I'll flip this coin, heads I stay tails I go' so she flips her coin which has already been a double sided 2 headed coin and when the coin lands it has changed and is now a tails.