Mary-Kate and Ashley are looking forward to spending quality time with their Bassett hound, Clue - at a special sleepaway camp for dogs and their owners. But as soon as the three of them arrive at Camp Barkaway, the girls' canine partner starts acting strange. Then she disappears from a locked cabin! Has Clue run away? Or has she been stolen? It's up to Mary-Kate and Ashley to track down their beloved pet - with a little help from the other dog campers!