Betty Plum has never been in love. She's never even kissed a boy. But when H.O.T. Toby starts school it's like Betty has been hit with a thousand of Cupid's arrows. It's like a bomb has exploded – a love bomb! More than ever Betty wishes her mum hadn't died when Betty was a baby. She really needs her mum here to ask her advice. And that's when she finds hidden letters for just these moments. Letters about what your first kiss should feel like and what real love is all about … Is Betty ready to fall in love? Will she finally have her first kiss?