Nikki and Abbey Dog have had many adventures together, and today is no different. Nikki teaches Abbey Dog how to use the new doggie door. After many attempts, Abbey Dog pushes through and lands outside. But unfortunately, practice will have to wait because Nikki needs to leave with her family for church. Oh no! Nikki forgets to lock the doggie door. Abbey Dog slips through the doggie door and slyly follows the family to church. Finally, she sneaks in the church door and begins a fantastic adventure. What trouble will Abbey Dog experience? Will she find Nikki in the sea of people? Will the church crowd be shocked to find a dog in church?