As the last of the summer stardust spirits, it has been foretold that Lucy will have a big part to play in protecting others from dark stardust spirits. But to be able to do this, Lucy must practise her magical powers with Joanna, a friend of her best friend's mum and a particularly strong spirit. But, however hard she practises, strange things begin to happen all around Lucy. She's not sure her best friends can help and she can't even tell her mum and dad about her stardust secret.

Will Lucy's magic be strong enough to save herself and her friends?