Franks cat has gone missing, so she goes out to put up some posters asking people to look out for him. As she's sticking up the first one, nasty Neil Noble and his cronies arrive. After subjecting Frank to a barrage of teasing taunts, they throw her bag into the deepest, darkest patch of stinging nettles in the whole park, but the bullying is cut short when classmate Nick retrieves Franks bag and tells them to leave her alone.
Seeing as Nick is the boy no one wants to sit next to, the boy everyone says has fleas and smelt weird, Franks feels like she might die of embarrassment if people see her with him, but all that changes when she finds herself at Nicks house and hears strange, enchanting music streaming from the cellar.
It was music of a sort shed never heard before and makes Frank feel happy for the first time in a long time. After this, she cant keep away from Nicks house and on her next visit, she follows the magical music and makes an extraordinary discovery that changes everything. But soon enough, and as the bullying worsens, Franks newfound loyalty to Nick is tested to extremes and they both discover the power of friendship, through the highest of stakes.