When the Cowbell family goes on a week-long summer vacation to a rented cottage, the local police constables Bellybutton and Goggleclock are joyful. Finally a week of peace! Their joy doubles when they win a rent-free summer cottage for a week. What they don't know is, that these two cottages are next to each other! When the truth comes out, the constables are forced to disguise themselves to remain incognito. Unfortunately their alter egos, the artistic The Rubens Brothers, become an instant hit for Hannah Cowbell. Mayflower and Quiltshoe have immediate doubts about the Rubens; they must be escaped gangsters instead. The girls set to prove their theory. What follows is a chaotic and action full week - but also the most memorable holiday ever!