The summer holidays have finally arrived, and Daisy is bored. Daisy is glad she won't have to see her worst enemy Chloe for a while but she longs for a proper holiday at the seaside, building sandcastles, eating lots of icecream and maybe even spotting a mermaid in the sea. Daisy's sister, Lily, wants to come too but, she uses a wheelchair which can make trips to the seaside tricky. Especially with all that sand! Daisy's summer gets a bit more exciting when she starts looking after her neighbours' dog, Scruff. Daisy has always wanted a dog of her own to walk and cuddle! She knows Scruff would love a trip to the seaside just as much as her. Will Daisy, Lily and Scruff get their holiday and maybe even have a seaside sleepover?