Cleo is in for a big surprise when Anne adopts her—she meets Mowgli. Cleo is shocked and angry, and Mowgli isn’t happy either. Each dog is determined to be Anne’s one and only. They plot and play tricks, and Anne is caught in the middle and doesn’t know what to do. It seems like Cleo and Mowgli will never be friends!

Everything changes when Anne surprises them with a trip to her aunt’s farm. There, Cleo and Mowgli meet two spirited horses, Tanner and Filomena, who send them on an adventure and a mission: uncover the mystery of a haunted barn and scare off some troublemaking boys. But another adventure awaits them at the barn. Just when they think have a plan, a lightning bolt strikes, setting the old barn ablaze!

Now, with danger at every turn, Cleo and Mowgli must make a tough choice: keep bickering or team up to face their fears and save the day. Will they find the courage to become heroes—and maybe even friends?