Twins Wayne and Wendy have two extraordinary friends – an ice-cream van called Macaroni, and a goat called Gina. Then one day they both disappear! Who would steal a bashed-up ice-cream van, and a very naughty goat? Does someone know that Macaroni is actually magical…? Hot on the trail of their missing friends, the twins meet Pa Periwinkle – a famous apothecary who once owned Macaroni. The twins need his help! Pa and his magic Fizzbomb Sherbet are soon exploding into action…